I'm afraid I don't understand your comment. I think you're trying to say that it wasn't just racism that caused the war on drugs (and in particular on marijuana). But I do think the quote in the parent comment makes it pretty clear that the Nixon administration engineered the war on drugs in order to incarcerate black people (for political power, not necessarily racism, though the two are very difficult to divide here).
"Did we know we were lying about the drugs? Of course we did."
The linked article quotes the head of the proto-DEA making an extremely racist comment showing the reasons why he attacked marijuana. I think the specific targeting of drugs used by the black community (marijuana and crack were and are significantly more prosecuted than opioids and heroin) gives this weight above a conspiracy theory.
"Did we know we were lying about the drugs? Of course we did."
The linked article quotes the head of the proto-DEA making an extremely racist comment showing the reasons why he attacked marijuana. I think the specific targeting of drugs used by the black community (marijuana and crack were and are significantly more prosecuted than opioids and heroin) gives this weight above a conspiracy theory.