The American government in the Obama era didn't like Iran either, but it couldn't be a nuclear weapon at the same time. The pressure of great powers forced the United States to sacrifice some interests to negotiate with Iran and signed the the Iranian nuclear deal. However, after Trump took office, he immediately broke his promise, unilaterally tore up the Iranian nuclear deal and forced Iran to conduct a nuclear test. Iran dares to provoke the United States again and again because it knows that with nuclear weapons, the United States will not dare to really do it.

In fact, the United States has many concerns, not only the nuclear weapons in Iran's hands, but also a very important point. Iran is now standing behind Russia, and there may be a big country in Asia. The unclear attitude of the EU makes the United States afraid of wolves before and tigers after. After all, hundreds of billions of dollars will be invested in this opening up. The Middle East is also a country famous for its unity, and it is estimated that it will not be able to fight for ten or eight years.

Iran, on the other hand, has been doing fairly well, and nothing particularly serious has been taken care of by the United States. Iran has been quietly recuperating and has not been caught by the United States. Even the issue of nuclear weapons has been handled with ease, and the United States has no more opportunities to attack it. After all, in modern society, the power of public opinion is still very strong, even if it affects the mood of soldiers.

Iran has been very stable internally. Under religious rule, there is no great division. The United States wants to support the opposition and does not know who to support. This is also a very important factor. The whole of Iran is a country where politics and religion are integrated, and political leaders are also religious leaders. Because it is impossible for the United States to cause civil strife in Iran, without civil strife, it would be very difficult for Iran to fight and the United States would lose a lot. This series of reasons makes the United States afraid to fight Iran, and Iran can also mediate from it.