I haven't read the whole article, but there's three points in particular you should keep in mind.
First, superheroes are a lot like satire. They attract the kind of writers that are anti-Establishment, or that "punch up" in other words. You won't find as many pro-Trump or pro-Christianity stories because they don't naturally "punch up", they "punch down".
That's a good point. But not everything has to be "anti". Why can't there be a story where the Christian faith or modern day conservative politics are promoted in a positive light? Half the country favors those two things. Why not write something for those people instead of making them feel like the "bad guys" of a story or agenda?
Second, regardless of where you stand, there's no such thing as an apolitical superhero. Practically every major superhero was a response to a major political movement. Superman and Batman were a response to the Great Depression, Wonder Woman a response to feminism, Spider-Man a response to 60s youth culture, X-Men a response to civil rights, the list goes on. Now Marvel and DC like to pretend these characters are apolitical to maximize their profits, but their characters' politics are always lurking on the surface. And it's not always a left-leaning stance either: Iron Man, Flash and Green Lantern are some of the biggest Conservatives in comics. Batman and Cap also range from hardcore leftists to staunch right-wingers.
I agree regarding their creation, but in my opinion, those characters eventually reached a point of pop culture where they surpassed the politics of their origins to become loved by all. I'm not saying change those characters, but everyone should be able to love them equally despite why they were created.
It's fine for Iron Man to be a more Conservative type of character, but if you're going to create a story that is essentially Conservative values versus Liberal values (loosely) like Civil War, don't turn the Conservative character into an Evil super villain. Millar handled that horribly. The more conservative characters became the villains and the liberal characters became the heroes.
And the same with that recent issues of Champions. Don't write a comic that depicts Trump as an evil dictator and his followers as racists and then have nothing to show the more accurate depiction of both Trump and those who voted for him.
Third, SJWs are the new scapegoat of the internet. It's become easy to point the finger at them for everything. It's no different this time.
Being a person who honestly believes SJWs are damaging our country, I do find it easy to blame them for a lot of things. I blame the hard push for adding homosexuals into Marvel comics for ruining Young Avengers for example. I'm not against homosexuals at all or gay characters (support them actually). But in Young Avengers, Gillen took a book that was about the legacy of Avengers and changed the whole direction of the brand into essentially a story about being gay. When a writer changes the whole identity of a book, character, or team out of the blue to push something they believe in... well then that becomes a problem. I don't know if Gillen is a SJW, but that's the sort of thing that kills a book for me.
Young Avengers was amazing from the time it launched until Children's Crusade and with all the minis and one-shots in between. It was amazing because it dealt with homosexuality, yes, but also other topics of note. And it was all put together as a Legacy team book. When Gillen came in he removed all but one of the straight characters (Kate), added one gay character (America) two bi-characters if I remember correctly (Marvel Boy and Loki), then another character who came out as gay in the comic (Prodigy), and then had the one solidly straight character's sexuality questioned in the end (Kate by America). And the whole story was an analogy of gay youth, coming to grips with it, facing parents and society over it, etc.
Don't get me wrong... I get the appeal of the story for its audience, but that book COMPLETELY changed identities under one writer with zero natural build up to it. Gillen, it seems, used this title to push what some consider to be a political message. And sadly, it seems to have killed the Young Avengers franchise as that new team he assembled has completely dissolved and gone different ways and there's been next to no mention of the original group or even new group reuniting at all.
Heh, and apparently I'm rambling and lost track of what my original message was. But I'll just say that pushing politics in comics so that it changes what the character or team originally stood for damages a comic. Young Avengers is an example of that. And being that many of these writers who do that are SJWers... the shoe just might fit.