“As an aside, I know of meth users who are very conservative on every other topic”
That makes sense.
Amphetamines, opioids, alcohol, nicotine, do not affect the mental aspects of the brain in the way marijuana and hallucinogens, do.
These latter drugs change thinking and world view.
The New Left always ragged against alcohol and nicotine while advocating use of hallucinogens.
There was and is a reason for that.
We still see the exact same New Left garbage being thrown out here in certain posts extolling weed in contrast to the “demon alcohol”.
I’ve never read a study that showed this. Where are you getting your data from? What part of the brain determines philosophy and world view that cannabis effects particularly that other drugs do not?
For example ... ?