DeclineIntoCensorship

Do you think that the American taxpayer is going to stand for that if you get thrown in jail in Germany for posting a mean tweet?

This guy isn't aware that free speech in Germany and USA are different things.
In the USA it means you can say anything. Anything. You can literally insult other people and they can't do anything about it.
In Germany freedom of speech means you can say anything as long as that doesn't violate the rights of other people. For example you can say you don't like other people but you are not allowed to insult them because that is slander which is punishable by law. (A guy called a police officer peppermint prince because of the green uniform and got a pretty hefty fine for that.)  
 

The Biden administration did more to destroy free speech, not just in the United States, but also in Europe, than any administration in American history

Biden did nothing like that to Europe. That's a lie.  
 

Germany hosts around 35,000 U.S. troops, a legacy of America’s post-World War II security commitments and Cold War deterrence strategy.

Historically that's correct. But nowadays most of these soldiers are stationed in Ramstein, the major logistics hub of the US military in Europe. If the US leaves they'll lose most of their ability to quickly move troops, supply and arms across Europe, Northern Africa, the Middle East and Eastern Europe (Ukraine).
The USA can reduce the soldier count by a few thousand without the mentioned downside. That's not threatening to Germany or Europe at all.