EG, I think you are mixing up two different topics here, which are civil unrest in a native subculture (i.e. the Black riots in Charlotte NC) and terrorism which pretty much divides into "domestic (homegrown)" and "immigrant" categories.
When it comes to civil unrest, we have the Black subculture in America, whipped into a "righteous fury" by "community organizers" such as Louis Farrakhan, Jesse jackson, Barack Obama, and Al Sharpton. Then we have the Latino subculture, which has hotspots and very large minority populations in the five states of California, Texas, Florida, New Jersey, and Illinois.
Pardon me, but outside of political protests at the other major political party, the White majority is relatively peaceful. They hardly ever loot stores while demonstrating, either. (I get to say that as a member of the most despised group in America, the financially conservative, heterosexual adult White males who support both the police and the military.)
Warning: Now I will be politically incorrect. Terrorism is largely associated with one religion which is Islam. I do not doubt that the vast majority of Muslims are good peaceful people, whether they be native American or immigrants. But some are not. That is after all, what the Skittles analogy is all about.
End politically incorrect monologue. Otherwise, I find myself in agreement with many of your words. I like that you don't mind pulling the flush chain on the LIMs (Liberal Idiot Members) at PO.com.