That's easy.
Mengele, the Hussein Brothers and the Green River Killer were all adamantly opposed to drugs of any kind, including pot.
Does that put you in the same group as them? Does it also mean that those who are adamant anti-Marijuana advocates are also into the pleasure of human dismemberment?
Thus is the strength of your associations.
I very well could be wrong and if so I’ll accept that. But a THOROUGH statistical study would be necessary, not just citing a few exceptions here and there.