I don’t think he’s the same as the alt right at all. From what I’ve seen and heard so far anyways. But again. “Starting”
Again, he's not your angry, loud, inarticulate guy posting on some incel sub-reddit. His basic arguments generally align with the alt-right, though.
Firstly, and most importantly, that there's a wide-ranging conspiracy to introduce Marxist ideas into (Western) society and scholarship and soften people on them, and then to convert the West into a brutal, Stalinist dystopia.
That feminism is part of this and generally a very bad thing which undermines pillars of our society and leads us(Westerners, of course) all to our doom.
That political correctness is a bad thing, but also specifically aimed not at making oppressed minorities feels safer in our society, but at the majority to take away their basic freedoms, like the freedom to hurl abuse and slurs at everyone and anyone.
The general idea that "our" society is under attack from without and undermined by traitors from within. Basically, white nationalism in slightly different terms.
Finally, the idea that racism or misogyny aren't nearly as big a problem(if they exist at all) as talking about them. The real problem is pointing out the existence of inequality, not the inequality itself.