Answer: Imam Khomeini the founder of the Islamic Republic once drew comparison between the hellfire and the nuclear bombardment of Japanese cities of Hiroshima and Nagasaki by the United States during the World War II. The great spiritual and religious leader of the world also reminded the crimes committed by the United States and some of its allies during his speeches to the masses and dignitaries.
Imam also tried to raise awareness among the US public about the crimes the US administration was committing through launching wars against the Muslims and the oppressed nations in different regions of the world.
Imam also warned about the consequences of unconditional support of the Washington for illegal entity of Zionist regime which was posing a great danger to the Middle East region and the Muslim nations. After exploring Imam's speeches, messages and works, some can conclude that Imam's views about maintaining ties with the government in Washington were conditional.
According to Imam's views, if the US government gives up launching of wars against other nations and shows repentance towards crimes against other nations, then establishing ties with Washington would not be objectionable. It is note-worthy that Imam was staunch supporter of expanding political, social and cultural relations with the US public and masses.