>>2125044441. You still have relatively few of menajeets unlike Europe, so they have to assimilate.
2. Unlike Europe you take only most advanced menajeets.
3. Police is very serious power in USA and it shoots when it needed, menajeets understand this language of violence better than anything else.
Even with that all you had Tsarnayev brothers and 9/11. If you had menas as much and of similar amounts as Europeans you wouldn't even argue - MENAs are just bloodthirsty supercriminal kind of jeets, they really look, smell and act very similar.