OK, so its better to what, elect Marco Rubio or some shitheel like that? I mean you got a choice amongst the people that ARE running, or Mickey Mouse if you so please.
IF Sanders is the ideologue you believe him to be, then he has about as much chance at getting elected as Ron Paul.
Remember, during the last election primary, Ron Paul was in 3rd place with the voters. He scared the establishment so badly, when announcing the placement of candidates on television I distinctly remember hearing them talk about the "First, second, and FOURTH place" Republican candidates, specifically so they wouldn't have to mention Ron Paul's name. You can say what you want about the man himself, but the media's obviously intentional campaign to hide him from the public is undeniable.
Same thing's gonna happen to Bernie if he's even half the man he seems to be. His only chance to be elected will be as a third party, and we all know how the ignorant masses feel about third party candidates.