This seems to be based on prior usage, so causation vs correlation comes into question. And I'm not saying this at it is used on reddit, conservatives most definitely would be highly less likely to take psychedelics.

Not to say that this study is uninteresting or useless though, I think there is a lot to be learned in this area, and I would argue that it would be very much in the best interests of Democrats (if that's truly what they are, I'm not so sure) to decriminalize these sorts of studies. Personally, I happen to believe that most Democrats and Republicans are essentially the same people wearing different costumes.