“…there was a 4 year gap between the end of prohibition and the introduction of the Marijuana Tax Act.”
not to be a stickler, as I agree with your assertion that it was mostly about being skeeved out by the Mexicans, but there was the Uniform State Narcotic act, which was brought into being in 1925.
It’s all a filthy sham, whatever the case, and it’s good that it is changing.