It's mentioned in the article. Bronze Age Pervert. He's one of the people that are loosely lumped into things like the manosphere or "dark enlightenment." He writes about how men are weak these days and need to be more manly and how women shouldn't have rights.
He's also known for constantly showing off his body and posting images of young bodybuilders as some kind of icons of masculinity. He's also known for challenging people to "winner takes all" wrestling which is a "form" of wrestling where the winner fucks the loser.
That's why I say he's a homosexual fantasist. His whole deal doesn't stem from a serious political commitment to curtailing women's rights. It's a fantasy about powerful, strong, sexually dominant men which is actually quite common in the gay community (I know, I am gay).
Is he Jewish? I don’t know. In any case being Jewish doesn’t preclude also being a weird Internet personality, just look at Ben Shapiro.