It isn't mostly used by minorities it is mostly used to target minorities. Though people in poorer conditions tend to have worse trouble with addiction due to lack of safety nets and people who are on the streets more are going to get busted more. Like no one is going to bust me if my buddy brings over an 8ball of coke and we snort it all up in the basement.

And I remember the quote its from Nixon's aid. But I remember trying to verify it once and not finding anything conclusive.

I remember my eritrean friend telling me the cops here used to to stop his car and do body searches on them and everything I mean he was dealing crack and had guns but they had no probable cause for the searches it was definitely just because he was black. They would never do that to me because they don't want to and they know I'd be calling a lawyer. I've definitely driven around with more drugs than he had on him and wasn't even a little worried because I was following traffic laws in a decent car.

Also had a white friend who put himself through college running coke from the big city up to ours. He had a newish little Hyundai never once got stopped or hassled at all.