I've learned to take good rhetorical stances that make them look like hypocrites without directly calling them that. (Never call a chud a hypocrite, btw, it's counter-productive) When they move back from their position i hammer that they never had any convictions about the thing in the first place. I've gotten half my chud relatives to admit they don't care about international order, free speech, equal rights, peace or anything anti-war, that they are fine with genocide, that they believe might means right, and more. I have a mental list and whenever a topic comes up and bring it back up that they have no right to be angry over ideological positions they've disavowed. Its very annoying for them, extremely so, so they've stopped talking politics around me because I don't care to call them a hypocrite, I just point out that they don't give a shit about the thing.

Sometimes they'll try and do the same but here's the beauty - when you are an insufferable ML like me all your positions are deeply entrenched. You double down and defend your openly held beliefs. It's easy when you have an actual ideology and convictions you are willing to stand by.

Unfortunately you need to take on abusive habits with them. Be deliberately calm when talking about it and take on an extremely judgemental tone - as if you are some kind of arbiter deciding their moral convictions. It's insufferable. When they raise their voice tell them they are being emotional. They'll never admit they believe horrific things. You have to dog walk them to the point. Don't tell them what they support. Get them to tell you and then point out how the consequences of what they support have already led to X,Y, and Z. The more you question them about each and every element of their beliefs, where they heard them, why they believe them and challenge every little aspect of it, then it starts to fall apart. Look up the Socratic method. There's a reason people got so sick of that dude they made him drink poison.