They failed to kill him with a bomb in an effort to stop the useless bloodshed. Hitler responded by executing hundreds of Germans including his illustrious General Rommel. There is growing evidence that at least one misanthrope caused the Vietnam War. Man, by his constitution, is a spiritual, religious being. Thus, religion is the basis of civil society.
Man is basically good.
Society holds together through man's spirit of fair play and the spirit of religion. Two thousand years ago, Christianity converted a barbaric pagan Roman Empire with the argument that love was a viable force. It spread the message of love and that man was basically good. Thus, Christianity was a natural target for misanthropes to penetrate and control. Love and goodness are considered highly dangerous by them.