Trump has a very long history of using this kind of thing to say what the campaign is thinking about doing.
If you want to stop that kind of fascist outcome, about the only real option is to make sure Biden gets reelected and has a Democratic congress to help him.
That means three things:
- Double-check your voter registration. Turned 18? Register. Moved? Register. Changed name? Register. Live in a state where Republicans might have purged your registration? Check your registration
- Volunteer. That means in-person if you can. Phone bank if you can’t.
- Kick in what money you can. To the Biden campaign and to a close house or close senate race.
I don’t think the word Reich, without further context, is by itself suspect in German. It just a generic word for realm, and is not bound to any specific political system. Even their parliament building is still called the Reichstag. In German it’s also common to refer to modern day monarchies as Königreich. Even the Belgian constitution, where German is one of the three official languages, refers to the country as das Königreich. And there are even two whole countries that have it in their German name: Österreich and Frankreich.
Where it becomes suspect is when inexplicably the German word is used in the English language in a certain context by certain politicians with certain ideas, as it is here.