Hint: Germans didn't fix it by themselves.
Of course, but the rest of the world didn't take those actions until after the German military moved into several other countries. And that action was done in the defense of those other countries as much as it was to spank the Germans.
Nobody is coming to the US to save the US from itself. Things will have to get a helluva lot worse before that happens.
And it won't be done to rescue the Americans, it will be intended to beat them into submission.
Plus, the rest of the world remembers that the Americans didn't help us in WW2 until the war finally came to their shores, after the rest of us had been fighting for 3 years.
Both can be true in this case.