Yes, and the Reichsbürger movement (something equivalent to the sovereign citizens known from a neighboring thread) claims that Germany is not a sovereign state, thus they are not subject to our rules. When the German government fails to act on this they will interpret it as proof of their stance. And they will declare their “independence” again. Fascists the world over have many similarities, starting with stupidity, bad taste, morosity and racism. But the list is much longer.
The problem is that Germany will not bomb or even just close or block US air bases in Germany. This is even more unthinkable than the US invading Greenland. It will simply not happen. That is not what the Bundeswehr (German Army) is about.