In this case, I almost don't know of even any right wingers that aren't ok with marijuana being legalized. They're doing it purely out of being anti-democratic. Plus I'm 100% sure that every single GOP politician that voted against it is a regular user of a worse substance. It has nothing to do with anything other than them intentionally fucking up democracy so they can point to that is their reason for why they need to destroy it.
Just wait, they're gonna drop all pretense soon and they're going to regularly start arguing that "sure the Nazis might have done some bad things, but they got things done because they didn't put up with any dissension".