Marijuana vs. cigarettes

I wanted to hear some opinions on the legalization of marijuana. I'd like to hear them in the context of why cigarettes are legal while marijuana is illegal.

I say that cigarettes are a ton more addictive as well as lethal and it's a bit hypocritical for marijuana to be illegal, but all viewpoints are welcome.

I guess I should throw it out there that my grandmother died because of her addiction to cigarettes, and I've not known one person to have a negative health side effect from marijuana (and I know plenty of weed smokers). I also smoke neither of them.