In the US, prohibition of marijuana was enacted for overtly racist reasons. Latinos were the concern.

then at some point was expanded to whites.

It always applied to whites and everyone else, of course. But back then, whites were not huge users of it.

Hippies. It was explicitly targeted at the anti-war, vaguely USSR-sympathetic left. Can't

I didn't say white people weren't included in political repression. The Nixon administration explicitly targeted cannabis-using white hippies.