How come Superman didn't kill Hitler?

[Mr2U]

Even though they adopted "Up, up, and away!" as their battle cry?

French have a battle cry ??? sorry but I know squawt about comic books... for some reason even as a kid I didn't care for them, and have no interest in movies about them even.

But one thing I'am really suprised is no one on here has made paralysis or wheelchair jokes yet... I'am waiting