“Then where did you get your opinions on what the appropriate role of government with regard to marijuana should be?”
I was an atheist Libertarian (registered and card-carrying!) until I became a Christian at 21. I then became a Christian Republican. I try to use biblical principles in my reasoning.
In re: the marijuana, I read in the the Bible’s case law that the people of Israel were required to put railings around their roof decks. This was the law. They did not get to wait until someone fell off the roof and got injured and killed. Preemptively, the law required that the railing be put on the roof. By way of explanation, people commonly spent a lot of time on their roofs.
I believe that principle of law is still appropriate for the world today.
I might, in a strictly Libertarian world, put a blindfold on and then drive down the street. No one could arrest me for doing that, unless and until I hit someone or something.
But in my Christian conservative world, I believe I should be arrested for deliberately impairing myself and then driving around. BEFORE I hit somebody.
Similarly, in a strictly Libertarian world, a person high on a substance would be allowed to take care of little kids, or a homeowner could have parties on their roof with no railing.
But in my Christian conservative philosophy, endangering others in a such a manner would be criminal. There is precedent in our civil and common and criminal law that forbids ENDANGERING others. I believe that is legitimate.
There are degrees of endangering. I understand that. Deliberately altering your mental state to where you are not competent to function as a normal adult is too high of a degree for me.
And that is why I do not approve the legalization of recreational drug use. I do not approve the legalization of drunkenness, either.
While your arguments may be justifiable scripturally, I cannot support that as being politically conservative, particularly when applied to national drug policy. We have a national government of limited enumerated powers. Those powers are enumerated in the Constitution, not in the Bible.
I don't encourage or generally condone drunkeness either, but you need to consider the unintended consequences of giving politicians and bureaucrats the power to decide how much wine you should have with dinner, and the police the power to enforce it.