I think you could really help them by using their own tools against them. Something they are already aware of.
I especially mean "agree and amplify."
(I think this one is incredibly useful pretty much in social interactions with anyone.)
Say, they say something about how women are this or that.
In a playful way, say...
"My friend. I have reached a higher level of consciousness. I have transcended limits of human understanding. I wanna now share my newfound wisdom with you. Yes. You are right. All women are soulless parasitic monsters that are trying to cause absolute chaos. You have to run before it's too late and they get you. I have an atomic bunker that's located deep underground. Come with me. It's the only way we can survive the coming disaster. We're gonna survive through this tough shit. Then we're gonna make our own empire after. We can do this bro."
(Make it sound like you're completely on their side. Not like you're being sarcastic.)
I think this would probably completely catch them off guard. They would probably not defend much at all. So if you would continue like that. They'd pretty much start agreeing with you that yes, it does start sounding insane. And that would probably make them self reflect at least a little bit.
But I never tried it. It really popped into my mind just a few minutes ago and it made me feel like damn, it would probably make at least me think that something is wrong at the time when I was really deep into it.
Sorry that I'm kind of spamming the subreddit. I just wanna share what I thought of and receive some insight from you all.
I'll settle down with the hyperactivity incredibly soon I promise. Pls don't beat me with a machete ;-;
