No. I am not.
The drug epidemic that began in the 60’s was pushed by the New Left for a reason.
Does anyone seriously think dopers are conservative?
Smoking dope affects the brain and does increase susceptibility to certain types of thinking associated with left and liberal ideas.
Yes, it does seem to have long-term negative effects on still-developing brains. As far as "susceptibility to certain types of thinking associated with left and liberal ideas", I don't know. Maybe. College kids tend to be that way anyway.
If I try marijuana and lose my strong pro-life, traditional family, and Christian orientations, I'll let you know. At age 59 I doubt that is going to be the case. Not aware of any drug that would do this except for something like scopolamine that would make one extremely suggestible for a short period of time.
When you say "dopers" that implies chronic use and that recreational drugs are central to their lifestyle. That is bad regardless of political orientation.
I don't believe you can say that occasional users are all liberal. That just isn't true.
As an aside, I know of meth users who are very conservative on every other topic. They get caught up in an addictive drug and it doesn't matter what their political orientation is.