Drug laws should be considerably relaxed (I actually favour full legalization of basically everything) but there is pretty strong evidence however you splice it (or rather whichever of the oh top three or four most likley social groups you may have in mind) that they would still be incarcerated more. I'm willing to go for 10 to 1 odds that this would be so even in a perfectly fair (whatever that is) system.

Some people just commit more violent crime than others.