An example shown in the Twitter comments was "Deport dreamers." That's about immigration status, not race.

That's nonsense. Immigration restrictions are one of the mechanisms through which American racism has traditionally been expressed. You might as well claim that redlining wasn't racism, because it was housing policy.

Turning around what you said, how many people have ever said, "My ideas were suppressed by superior force! Now I realize they're wrong!"

I'm less interested in convincing Nazis that they're wrong than I am in keeping them from organizing, gaining power, and killing people.