The main idea: capitalism and fascism aren't normally in lockstep. There's no room for my enemy's-enemy: we shouldn't fight fascism by defending business as usual, and we should watch out for centrists using "anti-fascism" as a weapon against leftists. Because they will and they do.
The book is cool in that it's the greatest hits of a project 20 years running. I knew nothing about it. The essays make their arguments but also serve as a history—as Anti-Racist Action and anti-racist skinheads expanded from street-fighting Nazis in the 90s to take on the less boneheaded alt-right. As the Nazis become alienating (no longer wearing arm-bands), the anti-racists have done the same. Or both have tried to, anyway.
Some essays are provocative and incitement. Others feel a bit pedantic, but I'm not afraid to skip an essay to get back to the good stuff. My favorite was Tigertown Beats Nazis Down...raw, earnest, and tragically funny.
The era of Trump II is going to be a hard lens to read this through, though. The book was published with the possibility of a second Trump election, but one that was expected to be similar to his first term--disorganized and bigger on talk than action. I'm writing in April 2025 and I feel like there's no telling how we'll be thinking about the far-right even two months from now. So much has yet to happen. But still, this book is a documentation of the roots of US anti-fascism and whatever comes next will be grown from that rootstock.