Ignoring entirely that it’s a tired gag already. I would wager a sizeable amount of the pushback is from people who are just tired of seeing these posts still clustering about their feeds.
Being loud and given attention, they can be the only example of “leftists” some people knowingly interact with.
Eh, there’s also a decent chunk of non-native English speakers who might have a harder time with written sarcasm, and Poe’s law, I don’t doubt, accounts for more.
I don’t have their numbers, but this isn’t the first place I’ve seen similar quoted. First one I found through some friends’ discussion was this, which puts us, at a quick glance, at around a third of last year’s total(still plenty bad).
So long as we are anecdotal, that has not been my experience.
Judgments along observance lines, and people thinking those in some denominations are crazy or lesser, but I haven’t seen it drawn on those lines.
Generally the same kind of a thing you’ll find in any religion, or any fandom for that matter— those who are more observant or more dedicated may say the less observant/dedicated aren’t doing it right; the less observant/more casual may say the more observant/dedicated are crazy.