Why Clinton suppporters are still mad at Sanders

Good article here. A main reason is that Sanders' policies force them to look at themselves in the mirror. Clinton supporters don't want to face the fact that to do so means they support fracking, disasterous free trade deals, more fossil fuel drilling, carbon pollution, letting Wall Street skate and non-universal health care. So instead of facing those facts they rationalize that Sanders is the bad guy for not just giving it to these corporate agenda items for the sake of...what exactly? Selling out?