We have to deal with the situation we have and criminalising alcohol would be very difficult, its too entrenched.
The fact that alcohol is worse and legal is not in itself an argument for legalising cannabis.
So the St. Valentine's Day Massacre isn't enough to convince you Prohibition was a bad idea, eh?
Also the SVD massacre was IMHO only tangentially associated with alcohol. It was part of a war between armed gangs, had it not been alcohol it would have been gambling, prostitution or something else.
However my karma has taken enough hits for today.
I'm pretty sure alcohol (like everything else) was legal by default, and had to actually be prohibited at some point before it could be legalized.
It's all law and nanny state - don't we give humans any credibility any more? It's good to have the debate. I've brought this up with family, my mum sees drugs as a black and white issue - but she's happy to be drinking wine whilst she's damning pot smokers. There is such a thing as moderation mother.
(There's a lot of that - I don't agree - so I'll down vote you mentality up here in the cloud :))