A question often arises in many circumstances, who is most dangerous, Iran or America, and who is better to have alliance with, Iran or America.
The  answer should not be emotional, discriminatory, or through abolishing the mind by following a given  methodology of questions and answers?
A secular person may say that Iran is the less evil because it is a neighboring country, and is against imperialism, or at least we should have good relations with everyone regardless of their ideology.
A Shiite may answer that Iran is better because it is an Islamic country and they love the descendants of the family of Prophet Mohammed. Answers vary from person to another according to their knowledge of the two countries.
In a seminar , a politician asked this question to the audience. Most of the answers were that Iran is the most dangerous. One of the audience objected and asked why? And many gave their views.
The truth is that both countries pose threat to Yemen, and the prospects of their goals are bad from many aspects, however the threats of Iran exceed that of the Americans from many perspectives. Let's free ourselves from sentiments and discuss the dangerous aspects of the two countries.

First: the American threat to Yemen
 
America has colonial trends in occupying any country because it believes that it is the ruler of the world.
It has many strategic and economic ambitions in Yemen and seeks to impose its domination to preserve its interests.             
America is nursing a grudge against Muslims and especially the Arabs, though it doesn't announce it publicly, and enjoys hearing about casualties in them.
They are the great losers from the terror and al-Qaeda extermination in Yemen. America wants the continuation of terror so that it will be an excuse for occupying the country and to impose the international community (America's,) will, in the name of terror fighting. They are stunned with the Yemeni army's success in crushing terror.
They are embarrassed and their only alternative is to laud the success though they know in advance that Saleh used to support terror under their cover. The American ambassador has visited Abyan after the success of the battle as if they are the ones who defeated al-Qaeda, though they failed to do this during Saleh's rule. 
Secondly: the aspects of the Iranian threats

The Iranian threat is greater than the American one however we should avoid both of them. The Iranian peril exceeds the American with many folds, and we should not be deceived by the name of their Islamic republic.
We don't agree with them in our holy book or the sayings of the Prophet. Their religion is dedicated to hymns and the reverence to people and not the God of the people, according to the Muslim's belief. The Iranian threats lie in the following points which include,
They have colonial ambitions like America. Their fundamental Khomeinite principle is to export the revolution through the establishment of a Shiite belt as a overture to the occupation of the Arab countries so as to impose the Shiite doctrine through arms. This is not a prejudice against Iran but it is written in the texts of the Iranian constitution, and their Revolutionary Guard is bound to support this principle.
Iran and its agents in the area do not believe in argument for convincing others with their beliefs, because they know that their doctrines are only superstitions, falsehood and ceremonies. People will only be convinced through force. These superstitions and falsehoods are only a subterfuge for reinstating the Persian empire which was destroyed during the era of the Caliph Omer Ibn al-Khatab.
They have never forgotten this catastrophe, and they are awaiting an opportunity to revenge the Arabs and Muslims. This is not just transient words, but they seek to accomplish their plan through the descendants of the family of the Prophet.
Iran believes in the Shiite Twelfth Ja'fary doctrine which legitimizes the killing of the Sunni as a worship to God. The Americans haven't got such belief. We saw this happening in Iraq, Yemen Lebanon and Syria.
In Iraq during the rule of Ibrahim al-Ja'fari, who was before al-Maliki, more than fifty thousand persons had been slain in one neighborhood. When al-Maliki came he carried out massacres which are worse than that, as they kill according to names. They used to kill anyone who has an identity carrying the name of one of the Prophet's disciples.
They are alike in Lebanon and its borders and don't differ very much. During the massacre of Sabra and Shatella the Shiite Amal movement, participated under cover of the Shiite Alawis in Syria. In Yemen, the Houthis who are the agents of Iran,  are still killing hundreds of Muslims and promise their followers to go to upper paradise the more they kill.
They have no conscience or religion regarding blood. There are endless massacres in Syria through the Shiite Iranian support everywhere. This makes them more dangerous than others who work under Islamic cover. Pharaoh has been more lenient than them when he ordered the killing of men and saving the women. The genocide now in Syria includes the men, women, children and elders.
The Iranian Shiite principle believes in the prospected saver (al-Mahdi) who they think will  kill the Arabs when he comes, and this is his first mission. We in Yemen are the origin of the Arabs.
Iran has not got the human rights in their internal or external principles. Contrary to America Iran and its allies don't take into account the rights of men, children or women, however America alleges that it observes human rights. It is sometimes embarrassed when it commits massacres, because it has right organizations that expose its massacres. In Iran the only rights and freedoms are that of the Supreme leader. 
It is in Iran's interest to split Yemen so that its Houthi agents can establish their own area in the north of Yemen. They send generous support to separatists, on condition that they carry out this project. If the south is separated the Houthis will be able to establish their own area which will be under the leadership of the Supreme Persian Iranian leader. This is contrary to America which believes that the split of the country is not in its interest, not because they like it but because it preserves its interests.
The Iranian policy is dominated by connivance (Tokia,) which uses the media war for attracting the Muslims so as mislead the weaker ones  through two informational points which it considers to be fundamental for attracting the Muslims.
The first one is the aggressive war against America and Israel in word and not in deed, without real clashes. This cannot be denied, as the people are fed up with the Iranian nuclear weapons, and nothing had happened in reality since 1957.
The Iranian media and its allies are waging war against America and Israel, but they hadn't killed even a single American or Israeli. Iran threatens of wiping Israel from the map, but it dare not do any real action. Iran and Israel keep on exchanging this war of words.
We heard that Israel will destroy the Iranian nuclear reactors, then it turns out to be only a media propaganda for misleading the Islamic world. This doesn't mean that they have no differences. There are differences among them over many things, but there is an agreement between them against the Sunni Muslims. They are dividing the cake, when America dominates and then it delivers the matter to Iran to execute their agenda.
The Houthis raise the slogan of death to America and Israel at all times until they were exposed by their American ally who said that they are not serious in the slogan.
 In reality they only kill the Yemeni Muslims and America refuses to accuse the Houthis and Hezbollah of terrorism, while it accused all the armed groups that belong to the Sunnis with terrorism, including Hamas. The American destroyers moved when al-Qaeda occupied Abyan, but they ignored the control of the Houthis over Saada, as if America doesn't know.
Secondly they engage the people with the issue of Muslim unity, making them to believe that Iran seeks this unity, by forming the organizations and societies for this purpose, then they discover that they are not serious, and the only thing they want is to spread the Shiite ideology in the Arab and Muslim world.
Despite their extensive call for unity, but their politicians and media defame the Muslims' principles, including the honor of our Prophet Mohammad peace be upon him. They support more than fifty channels so as to fight Islam and its people who believe in the Quran and the Sunnah.
Those who follow the Islamic history find out that those who allege to advocate the family of the Prophet, only seek power control. They shed blood and deal violently with opponents, without leniency.
Iran poses threat to all Muslims, because their honor and property are threatened as it has no consideration to their blood, honor or personal property.
The Persian Iranian Shiite ideology violates the blood, property and honor of the Sunni Muslims. The practical genocide in Syria that excludes no one started in Syria and before that in Iraq. 
The brutal collective liquidation in Syria, requires that all should be aware of the Iranian expansion which spares no one whether they are adults, children, men women young or elders.
This doesn't mean that America is not a danger. It is also a danger and none of them likes us or seeks our interests. they haven't our alphabetical values. Our morals, love to Islam, hatred to America and Israel should not make us naïve. Omer Ibn al-Khatab says that " I am not silly and cannot be fooled by a silly one."