“Once the rockets are up, who cares where they come down
That’s not my department,” says Wernher von Braun
Wernher von Braun never made such a statement. The fake quote was used by comedians such as Mort Sahl to destroy von Braun’s reputation in the eyes of the public.
That’s from the Tom Lehrer song, actually.
And since a good number of German scientists did manage to escape and not work for the Nazi war machine, the ones who stayed are fair targets.