the people that give you those reasons are idiots. of course the government can tax it. but i doubt the amount of crime will decrease.
I do believe that if alcohol is legal marijuana should be as well. There is no real PRO from marijuana being legalized. Its just what people want. and seeing as how it is considerably less harmful than alcohol, it makes no sense why marijuana is illegal.
the legalization of marijuana is just a dream though. It will never happen in the United States. Maybe in a generation... but not now and definitely not within the next couple of years.