To be completely fair about the last point, immigrants you meet in the US are not a representative sample. I say this as an immigrant myself. The Bangladeshis and Pakistanis I’ve met in the US are educated and relatively liberal, having gotten through our immigration filters. But the beliefs and attitudes of people back in the country are totally different. For example, American muslims are slightly more liberal than americans as a whole on homosexuality, and 60% of Americans say society should accept homosexuality. In Pakistan it’s 2%: http://www.pewglobal.org/2013/06/04/the-global-divide-on-hom...)

Also relevant: https://www.google.com/url?sa=i&source=web&cd=&ved=2ahUKEwiM...

(Some) Pakistani-Americans I’ve met who’ve grown up here have told me that my parents should be executed for being Ahmadis once an Islamic State has been established (but graciously offered them a one time chance to repent). So much for the immigration filter.

Granted. I was going to include a note, but didn't want to get too long winded.

Non-representative sample, self-selected according to dominant migration obstacle (e.g. financial or educational).

> almost every Iranian I've met in the US has been an awesome person

Yeah because most of the ones here are the kids of the high-level government officials from before the revolution.