I support freedom and personal responsibility. That means I support the freedom to take drugs or drink or do whatever you want. As long as you don't step on someone else's rights, the government should have no reason to be involved.
Therefore, I support the push to decriminalize drugs just as much I oppose any attempt to infringe on 2A rights.
I don't see what decriminalizing drugs has to do with firearm ownership. If we truly believe in personal rights and responsibility, then surely we should give people the benefit of the doubt that they will not get drunk or high and hurt someone with their firearm. If they do break the law while under the influence, they should (and would) be prosecuted appropriately.
After all, as a group we should know that making something illegal does absolutely nothing to stop it from happening.