Bob, The problem is not diversity.
We've got plenty of that here.
My wife is from Schweiz. My partner; Richard, is from South Africa.
Neither of them have been a problem to society.
Richard's kids don't hang out on street corners and make life hard for Danish women.
We had a shitload of Vietnamese refugees come here when you guys had your little "let us get 60,000 young American men killed in Vietnam, so we can keep the nasty commies from spreading" thing going in Vietnam.
We had a lot of Hungarian refugees come up here when the Soviets invaded Hungary in 56.
They all were assimilated into the general population with no problems whatsoever.
It wasn't till the muslims startd coming here, that the problems started.
We'll have a lot of problems with them in future years.
So it is not "diversity" that is the problem, but muslims.