We don't need them, why do they?
We have poor folks here too, no shortage of young males, and jobs are scarce for everyone.
It might be racissss, but if you stop at the first part of your question, you might have the answer to most of the modern "urban culture" problem:
They produce and contribute nothing but problems for the rest of US society.
Perhaps the race baiters should dwell on that, but most likely never will.