America has a history of anti-Muslim rhetoric. Before September 11th, it was a part of the country but not part of the core American identity. Since then it has become a defining characteristic of our politics.
> Of course it was wrong and no wonder things are 100x worse (if that) as a result.
OR you could say the pro U.S phase of Iran kept things alright (relatively to after the Islamic revoltion) until it was over and we have the freak show we have today. It is true that the Shaa was a corrupt dictator , but it is not clear to me that the U.S should have disengaged from him. Qatar, Saudi Arabaia, Egypt and Jordan are all different kinds of dictatorships that are relatively pro Western and that the U.S engages with (sometimes even by supporting the regime financially/militarily as with Egypt and Jordan).
All in all, pro U.S/West Arab governments are in much better shape than Iran is today.
The Iran nuclear deal was a good faith and somewhat effective attempt to de-escalate.
America voted for less de-escalation and more threats and rule by fear and war, which is funny since they repeatedly insisted they were voting for "No more wars" by voting for the guy that very clearly wanted to go to war with Iran.
The deal Trump has been offering the last few months, which Iran has rejected, is pretty much similar to the previous one.
So you could say Trump shouldn't have pulled out of the Obama deal, that may be true, but you could also say Iran should have taken this deal instead of trying to drag negotiations forever.
It's clear to all intelligence orgs out there no country with a civilian only nuclear program enriches Uranium to the level Iran has.