There's nothing wrong with having a drink. Some days I think I like beer a bit better than weed. Not often though. The problem with both sides of the argument is some people can't be responsible no matter that they're on. Assholes will be drunk assholes when drinking and stones assholes when smoking.
I've met plenty of dickheaded stoners that love to start a random fight for no reason. Dickheads don't need drugs, they just need a reason to be a dick.