I'd add that if there's one lesson the left can learn from its loss in this election, it is that political correctness is a dead end. Safe spaces at college campuses richly deserve ridicule. The nation's overwhelming rejection of sensitivity politics shows that it is a liability in the end. The left should go back to the drawing board and develop more intellectually rigorous and consistent positions. Frankly, it shouldn't be hard to defeat a group of people that rejects evolution and still believes marijuana is as dangerous as crack.
Where I differ from the alt-right is that I believe their views are becoming mainstream and commonplace, and that the time to criticize political correctness was 15 years ago when it was less fashionable and personally riskier. The alt-right, amorphous as it is, will probably end up with the same fate as the vapid ideology it seeks to crush. There is hardly any innovation in the mainstream.