New York was/is multicultural.  I think the problem here is that these people didn't come to England hoping to work hard and achieve the "American Dream" they heard you could get free shit and not have to do anything.  Then they show up and the free shit isn't satisfying enough so they resent the locals for having more than they do.  

I'm for the free movement of peoples, but only if there are no handouts when they arrive....  Or at least I don't have to pay for them at the end of a gun😂