"You ignore all threats but one: terrorism. " Terrorism is the one under discussion, terrorism is the one that has YOU all hysterical right now, terrorism is the one that has the whole world hysterical.

And for millionth time, I describe EXTREMIST, ISLAMIST muslims as the threat, not JUST because of terrorism, but because of everything that comes along with islamism, i.e. the refusal to mix with non-Muslims, the gender segregation, the "alienation" from living in a non-Muslim society, etc. Those Muslims that do not buy into  this are no threat, in fact they are afraid of the extremists and need our support against them.

There are violent gangs of all stripes, I don't see that they are particular threat related to immigration.