It's still early. The Nazis took over in 1933, but their first euthanasia program didn't start until 1936. The Holocaust didn't really start in earnest until about 1939.
We can't let it get that far, of course, but the point is that it will take some time to get bad enough for people to start really fighting back. I suspect that protests will get really ugly and violent next summer, in the closing stretch before the 2026 Midterm Election.