That never happened ... unless you want to claim that everyone who supports the legality of alcohol and tobacco is thereby "promoting" them.
you're using the legalization of cigarettes and alcohol to get pot legal
No, I'm pointing out that your equating legalization with "promotion" applies just as well to already legal drugs as to currently illegal drugs. Do you claim that everyone who supports the legality of alcohol and tobacco is thereby "promoting" those substances?
and will support heroin in due time. So it's clear you are promoting vice.
Dragging in other illegal drugs doesn't help your argument - it remains true that if supporting legalization of a currently illegal drug is "promoting" it, then supporting continued legality of the currently legal drugs tobacco and alcohol is likewise "promoting" them.
Do you claim that everyone who supports the legality of alcohol and tobacco is thereby "promoting" those substances?
You do support legalizing heroin, though, right?