Hitler was pretty careful, especially after that assassination attempt.
Didn't he have them hung by piano wire?
Similarly some have asked why the Jews in Europe didnt fight back much more than they did.
The answer is that being THERE is much different than being HERE.
For the first few years in Israel, Holocaust survivors in Israel were treated with disdain by other Jews, because they felt they didn't fight back.
Then the Eichmann Trial, and they learned just how bad the Holocaust really was, and they understood.
“..some have asked why the Jews in Europe didnt fight back much more than they did....”
The Jews in the Warsaw Ghetto did. They knew they were going to die anyway, but they went down fighting. Brave folks.
“...being THERE is much different than being HERE...”
True enough.
But one still has to wonder if, at some time or another, it went through SOMEONE’S mind that “Hey... maybe murdering thousands of human beings is, well, a TEENSY bit wrong...and I should maybe try and DO something...”
There was more than one assassination attempt, too. There actually WAS an organized German Underground movement.
The Staufenberg plot (July 20th bomb attempt) was just the one that came closest to succeeding.