What are the go-to subjects for revealing the true, regressive beliefs of reactionaries who don't consider themselves reactionary? Off the top of my head:
-Trans people in sports: Major gateway to transphobia and misogyny. Complaints about trans athletes inevitably lead to sexism towards literally any woman with muscles. Pretty sure this is how Joe Rogan and a ton of his supporters became so unhinged.
-Affirmative action: So, so many liberals and "leftists" will complain about how they would've totally gotten into Harvard and Yale if not for The Blacks^tm^. Love to bring up SAT scores even though they've been proven to be racist and classist and a shit metric for intellectual value.
-Shakespeare authorship question: A bit niche. Basically, Curtis Yarvin and other Dark Enlightenment dweebs don't think that Shakespeare was capable of penning such timeless plays because he wasn't rich, and according to them, not rich=dumb and uncreative mental husk.
Homeless people. Even demsocs/socdems ostensibly progressive pretty much everywhere else will sometimes with almost no prompting (other than being with you when they see a homeless person) just make disparaging comments about homeless people without a second thought. Their reactionariness usually extends well beyond that too, but they keep it better camouflaged and them being anti-homeless will often be a first sign