Very interesting article.
Trump has exploited the people who feel demonized for what they say and think.
These days pretty much everyone is demonized by the SJWs (including their own people when they slip up) and so some people, tired of being called rape apologists/white supremacists/worse than KKK and Hitler, have supported someone who deliberately mocks every aspects of political correctness.
This is why the usual tactic of exposing un-pC things said by a candidate backfired with Trump. People who like him do so exactly because he's un-PC.
The root of this feeling is the utter demonization of "wrongthink". Leftist activists, academia and media haven't simply stigmatized some ideas, they have painted anyone who supports those ideas as a largely nonredeemable monster.
This is never a good tactic to actually solve a social issue. It's obviously not a good tactic now, when even the slightest disagreement from the culture of political correctness gets you branded as a villain, but it's not very effective even when dealing with real racists and homophobes.
Real bigoted people aren't evil aliens from outer space. They're human beings, who are bigoted for a series of psychological, sociological and even economical reason. I'm not saying that those reasons justify bigotry (again, real bigotry, not SJW-defined bigotry). I'm saying that if we can try to understand criminals and what makes them tick we should also try to understand bigots and what makes them tick.
Even when fighting against bigotry you should never demonize all the bigots. You should acknowledge their humanity, their dignity, even when they're terribly wrong. You should keep clearly in mind the idea that they're not completely alien to you. You should at least make an attempt to reach out to them as persons if the chance seems right, even if their ideas are horrible according to your understanding.
People should be punished for their actions, not for their beliefs, even if their beliefs are grotesque and incomprehensible for you. And shunning and demonization are a form of punishment, a really powerful one, since social ostracism is something that most people fear. For most of our species' history being expelled from their group used to mean secure death. We still all react negatively when told that we don't belong. When we're told we're evil and deserve to be punished we get defensive, we defend our ego.
Indeed this is why bigotry is harmful, but it's also why demonization in general is harmful. The most odious part of SJW culture are their double standards, which they continually justify as "punching up vs. punching down" and "no such thing as reverse bigotry". Many people who read of someone writing #KillAllWhiteMen or #DieCisScum being hailed as a hero in many leftist/SJW circles are going to reject every claim that their ideas are bigoted, even if their ideas are really bigoted.
Let's take, for example, someone who refuses to sell wedding cakes to gay marriages. Is their idea bigoted and, incidentally, potentially bad for their business? Yes. Are they irredeemable monsters for their decision? No. They're not even necessarily as bad as the KKK. Many of them probably feel uncomfortable with the idea of gay marriage, but not necessarily would approve of someone who said "kill all gays". And they probably see you as hypocritical if you attack them while you're writing #DieCisScum.
And if the SJWs attack them as irredeemable monster they're going to get defensive and think that they're being oppressed for their faith, and probably see Trump as a breath of fresh air.
Think about the Gelato Guy. What he did was bigoted and small minded. But you know what? He apologized. He acknowledged that he was in the wrong. That's something that should be encouraged: it's the start of a conversation, it's building a bridge. We all fuck up from time to time, but it takes effort to recognize having done something wrong and apologizing for it, and this effort should be recognized as a good thing to do.
How did the SJW react when Gelato Guy apologized? In the words of PZ Myers: "fuck him to the ground". He "sinned" so he was to be treated like a "sinner", with not even a slight chance at redemption. He was judged as being a monster, unworthy of a chance to be reasoned with. His bigoted, small minded ideas about atheists were probably confirmed by the reaction of FTB if he was exposed to it.
He probably thought "Fuck it, I tried being nice to them, I tried explaining that I overreacted, but they treat me like a piece of shit. They're really assholes after all".
This is what SJW "call-out culture" does an a large basis. By treating anyone who's even said something even remotely bigoted as a monster it
confirms the beliefs of people who are already prejudiced against black people, or LGBT people, or who are misogynists.
Treating someone as irredeemable is the best way to alienate them. If working class, non-college educated white men are described as a combination of the KKK, a rape gangbang and the Nazi party, they might as well flock for the only candidate which says "fuck political correctness, I say what you want to hear".
And this explains Donald Trump and many of those who like him.