There's a pretty big difference between democrats and the screeching political left, even though democrats have their votes locked down, just as the republicans don't really act on behalf of the birthers and kkk groups. I get that seeing Trump elected might scare some folks into thinking the fringe is driving the party forward, but really the tangible products of his presidency will be the same as those you'd have gotten from any republican candidate. It would be the samne on the left. It might normalize some strange ideas for the future to have Bernie Sanders as president, but he's not going to implement socialism, and nobody's agreeing to paying reparations.