For me the easiest tell is the up front, unprompted, and unsolicited declaration of nonpoliticalness. When someone takes the time and expends the breath to announce how nonpolitical they are, what follows is almost always a rant about how everything/everyone else is too political these days, and that of course leads into something between status quo advocacy and outright reactionary/regressive sentiments for some fabled time before those wicked politics were visible to the nonpolitical ranter. 
People that are hostile to service workers. Some just want to take some ideological stand against tipping when the service worker doesn't really have a choice and needs those tips to survive in the current unjust system in a way where ideological purity gestures toward that service worker just look like being a greedy and sanctimonious asshole. The worst of such people will actually declare, shamelessly, that they believe that service workers don't deserve a living wage. The implications of that are 
worthy.
I may get shit for this, but I'll say it anyway: this hair and beard combo, seen on living people. 
I have yet to meet anyone in person with that look that wasn't a chud.
(If one of you is a comrade with that look, I am sorry in advance for the prejudice and if I ever meet you in person I will atone by buying you a drink or something.)
I wanna commit
every time some nerdass reactionary motherfucker says
“if you’re reading [evil species] as a stand in for minorities I think you’re the real racist
”
GAAAAAH you disingenuous fucks! I don’t have the fucking mental fortitude to try to explain why this entire history racial coding and othering of minorities makes it a little gross when somebody says they think it’s cool to exterminate all the goblins/orcs/kobolds/etc. because it’s all pretend make believe!
It’s not even hard to make a designated group of villains! These orcs are a marauding mercenary band, these kobolds sabotage mountain passes to rob and murder travelers. That’s all you need! The race essentialism just ruins a setting for me unless they’re like, actual demons from hell or cthulhu squids (even then I’m partial to an occasional chill devil or squid). Writing the antagonists, regardless of species or origin, as people makes for media that is so much more compelling.