And the author is ethnically Jewish, atheist/agnostic, and polyamourous, so he definitely doesn't fit into the usual stereotypes of reactionaries if he is one

Oh yes it is. His blogroll is absolutely full of neoreactionaries, and the comments sections are a cesspit of racism and sexism (echoing many of his own views in more crude terms), even before you account for many articles he's written where he takes their argumentative points at face value.

We're talking about a guy who once put up cartoons of people making fun of nerds/gamers next to Nazi propaganda to show how they were the same. If that's where you're getting your "arguments" on workplace sexism and police violence, you're probably a reactionary.