Pot really is the best pain reliever out there. Unlike pills, it has zero side effects and can induce appetite. If alcohol is legal, pot should be as well.
This is how I see it: I feel worse for Cho b/c he lived his entire life in isolation, due to his severe mental illness. At least the people he killed had friends, loving families and made actual human connections during their short lives. He experienced nothing but pain and anguish. It's not an excuse for what he did (and I think the school officials should be held accountable for not securing the campus after the first two people were killed) but what is the harm in having compassion for a person like him?