You are stealing money from Brazil, exploiting them, and searching ways to steal more, and whoever will be in power there, he'll try to acquire some kind of leverage against the USA. Not necessarily they are already pushed hard, but those thoughts are, of course, a part of their concealed political discussion.
And, of course, you can make friendship, or, at least, more or less working relationships with Iran. Just f#ck off from them, return them what is rightfully their (including their frozen assets) and don't try to kill them (including attempts to inspire another revolution, foreign invasion or murders of their priests, scientists and political leaders).
Their "hatred" is not something irrational. It's quite practical thing. If you continue your vain attempts to supress the whole world (including Russia, China, Iran and Brazil) - you'll face much more grave consequences (including Brazilian nuclear program). But if you act like a responsible and lawful member of the international community (I very doubt you really can act this way) - you won't have problems with Iran.
And, singing the songs about America and calling you Satanists it's not a reason to kill people. Especially that you (certain groups or you) sometimes, also call yourselves like "Satans Angels" and so on ...
Not that I'm against your religions believs (whatever they are), but many Traditional Christians and Muslims don't understand reasons for your actions, and often attribute to you absolutely irrational hatred and violence. Like, you know:
