US soldiers werent garrisoned in Germany prior to WWII. US embassy staff and nationals in Germany prior to WWII were still subject to the laws of Germany, Nazi party or no.
Did we rebuild Nazi Germany afterwards, with the same philosophy?
No, we did not.
And once war was on?
All bets were off.
Your point is actually invalid.
What we SHOULD have done is tell them, “You don’t like the Taliban? Here’s the price, you want us to tolerate your religion, you tolerate our boys. Otherwise, we feed you to the wolves.”