What is the big deal with marijuana??? Shouldn't it be legalized already??

Someone can die from a single episode of alcohol consumption. No one has ever died from ingesting to much marijuana in one sitting. People get drunk, get into fights and kill others while driving under the influence. People get stoned, eat, giggle and relax. But you may say... oh smoking is harmful... yes it is VERY harmful... but cigarettes are worse and they're legal... so what gives?? anyone wanna add to this. and to any one that does resond... please respond intelligently and logically and if you are going to disagree please provide your reasons for disagreeing