They call us the Great Satan and profess to destroy our only true ally in the region. They sponsor terrorism around the world.
America is a far worse curse than Iran in the Middle East. America's been bullying Iran since the 1970s, when they broke free of American controle (America still holds the Iranian pretender to the throne, he lives upon the Atlantic Ocean, I think) and supported the polarisation of the traditional Sunni Arabic kingdoms (Arabia) against the new Shia government, and America sponsors far more terrorism. It wasn't as heck for sure the Iranian special forces that funded Mashriq, it was the Americans (and likely still are through Gulf accounts). Being friendlier to Iran would be a good idea, especially if they ever develop atom bombs.