Because the Left always eats its own. Nothing is ever good enough, everyone must be equally miserable and cater to the lowest common denominator; complete mediocrity and underachievement is celebrated. Obviously to them some deserve to be more miserable, just never the ones doing the finger-wagging and calling you every -ist and -ism.

To sum up, a bunch of complete losers are trying to make people feel bad for being objectively better than they are.