Alcohol kills people whether it's legal or illegal, but it kills more when it's illegal, due to crime and bad moonshine (good moonshine is great though).
Marijuana only kills people when it's illegal, due to crime.
There are a ton of reasons why it's illegal, but none of them make any sense, since alcohol is the most dangerous drug in the world, the most advertised, the most accessible, and the most culturally celebrated. That alone proves drug laws have nothing to do with how dangerous they are to the body, or to car accidents, or to families.
Marijuana doesn't put people with anger management problems over the edge so they beat their kids.