Clemenza, is this the case-- that 'white' people "are often insulted as they walk down the street by 'minorities'."
It used to be very common for "urban youths" to either mumble or outright catcall towards white folks who passed them by. You really don't see this anymore in Manhattan, but it still does happen in the more proletarian nabes in the outer boroughs (and urban New Jersey). Even then, the name calling can often be minority on minority, leading often to fights.
Reminds me of a time last year when I was riding the HB Light Rail in Jersey City. This large group of black kids started picking on this light skinned middle eastern kid, who, after one minute of talking, threw a water bottle at them. I thought a fight was going to break out, but the kids shut up.