We fought the Nazis in 1941-1945. These guys aren't Nazis, they're angry, misguided white people trying to look tough. Why is this an important distinction? If we as a society are going to upend core values and norms, we need to have a damn good reason.
If I were a cynic (which I sometimes am), I would say this guy was trying to ride a political wave and it is now biting him (and us) in the ass. DCMA takedown without a warrant is bad for everybody. It sounds like there is a decent chance he just squandered that to score a political point that no one will remember 6 months from now.
Politics and business don't mix, regardless of how much of a "slam dunk" it seems.