Be specific.
This topic is one big iceberg. It's all connected together with the real danger lying just under the surface.
You may have noticed "Conflating Freedom" responding to my posts. He has stated categorically that he is in favor of legalizing all drugs because the philosophical theory underpinning his ideology is that people have a right to use whatever drugs they want.
Much of our beliefs come from our foundational principles, and if you adhere to the principle that people have a right to do whatever drug they like, then you can make no arguments for stopping them from using really horrible drugs.
Marijuana is just the "foot in the door" drug. It is the Camel's nose in the Tent" drug. It is the "Civil Rights" argument of the Gay Mafia drug.
It is the attempt to establish drug usage as normal and a right, then to move the goal posts again later when it is acceptable to do so.
Marijuana is Germany invading the Sudetenland. If we do not stop them there when the cost in blood and treasure will be relatively small, we will be forced to stop them later at the Battle of the Bulge, after 20 million people have been killed... or we might not even be able to stop them and the forces of evil will win and continue dealing death as far into the future as the eye can see.
The foot of a legal mind-altering substance is already in the door - no help for me there. And if legalizing marijuana has the practical benefits I say it will - taking a big bite out of criminal profits, and increasing the comparative disincentive to move from using marijuana to hard drugs - then the practical argument for legalizing other drugs will have been weakened not strengthened. (And if legalizing marijuana doesn't have those benefits, the entire legalization idea will be dead in the water.)
Your accusing me of incrementalism may sound plausible - if you don't actually think about it.