And then Republicans will be wiping their @ sses with your face for the next several decades. Problem with purists is they have no problem losing elections as they value purity over success. Republicans may be craven hypocrites with no morals but they've figured out its better to have someone in your party running things than the opposition.
I'm going to give you a scenario that's going to make your head explode. Its possible the next Dem nominee is a current governor who banned fracking in his state, had the legislature legalize same sex marriage even though he needed Republican votes to do so, and has proposed free college tuition at state public universities. Who's this guy? Andrew Cuomo.

My take on you and others is you'd rather lose the next election to Donald Trump once again than vote for a guy who agrees with you on the aforementioned issues. This is the problem with people on the left.