One British colonel who knew about the operation could not understand why they were going after Hitler: He was doing such a good job of losing the war! Killing the Führer, he warned, might unite Germans against the Allied armies. Assassination would “canonize” Hitler and “give birth to the myth that Germany would have been saved had he lived.”
Another British officer said, “I think Hitler should be permitted to live until he dies of senile decay before the eyes of the people he has misled… Make him a laughing stock.”
Source:
Beschloss, Michael R. “The Plot to Murder Hitler.” The Conquerors: Roosevelt, Truman, and the Destruction of Hitler's Germany, 1941-1945. New York: Simon & Schuster Paperbacks, 2007. 8. Print.
Further Reading:
I grew up thinking that Hitler was a great military leader based on US history taught in schools. But as I've read more and more books on the subject, you see how foolish and short-sighted he was. Most of things that lead to his undoing were self-inflicted mistakes.