Uhhh, all of them? If drugs were legal, then they would be much easier to obtain. In particular, no one would risk arrest and/or death from attempting to obtain them.
Give me one good reason why beating someone's head in while stoned on Methamphetamine is more heinous a crime than beating their head in while "in a pissy mood".
You'll have to point out to me where I claimed this. This person should be sternly punished regardless of whether they were on speed or not.
What were the numbers before the Drug War?