The academic establishment is promoting fayggat marijuana even more vigorously than it is promoting global warming, critical race theory, and transgenderism combined.
That is a recent turn of events.
Just as there are many excellent older articles on vaccination risks or Russian and Ukraine foreign policy that were not subject to current “groupthink”, there are almost certainly older articles on the risks of marijuana.
The ones I remember from the sixties and seventies indicated that negative effects from marijuana were real and that they slowed down the developing of growing brains (in children and teenagers).
Another well discussed negative effect was that it was dangerous while driving, operating heavy machinery etc.
However I do not recall any articles suggesting that use of the drug led to mass murder (unless you buy the “gateway drug” argument that it is likely to lead to use of more dangerous drugs). The “gateway drug” view was always very controversial and I was not persuaded either way.
Fwiw I have two relatives who have been regular users of marijuana for years and are fully functional in their work and otherwise law abiding citizens.
My issue with them is they are brainwashed lefties—but I do not blame the marijuana for that.
;-)