Up until fairly recently (after 68 ) ALL gun control laws in American history were intended to disarm blacks, to keep them in their place.
Pot was outlawed so that towns could lock up Blacks and "Mexicans", (any one of Hispanic descent ) Whites drank, they didn't use weed yet, and leave more jobs for whites.
Remember, NFA, and the Bureau of Narcotics came about only to make jobs for Prohibition Agents who were soon to lose their jobs.