Jon Del Arroz did an interesting experiment where he went through the Twitter feeds of the current writers for Marvel comics and found that all of them were progressive and strongly anti-conservative and anti-Christian to one degree or another.
This isn’t at all surprising. People like this march in ideological lockstep, and work in unison to exclude anyone of conservative or Christian leanings from publishing on their platforms. (They all claim they don’t, of course, and perhaps they even believe it themselves, but their actions put the lie to it.)
This is why Rod Walker spends so much time inside publishing (not counting Castalia House). Indie publishing allows an author to establish his own platform without suffering through would-be commissars controlling the traditional publishing industries.