For someone left leaning anyone not agreeing with him is a "Nazi", "fascist", "racist". The right leaning group interviewed in the article got sick of that as well.
I hope you don't actually mean that you think that most or all left-leaning people believe that. I admit that this would be a much less severe accusation than calling all right-leaning people Nazis, but it would still be nice for people to stop stereotyping other people based on their political beliefs.
I think that the whole "PC" issue is an example of this going both ways. There's certainly a bad kind of insistence on political correctness, which often takes the form of demonizing people who express an unpopular viewpoint or who merely say something that could be construed as expressing an unpopular viewpoint. On the other hand, I think there's just as much rhetoric going around claiming that left-leaning people are horrible for supporting this sort of political correctness without any particular evidence that they do so.
Calling a Nazi a Nazi is one thing, but do you honestly believe that nearly 50% of American voters are Nazis, Nazi sympathizers, or have Nazi-like views?
I don't. I think nearly 50% of voters thought that, in balance, Trump was a better choice than Hillary.
If all Trump supporters are Nazis, then presumably all Hillary supporters believe that one should unashamedly lie rather than admitting that one made a mistake. Both of these conclusions seem equally false to me.