Dear jonathan dough and PSacramento,
Without addressing the first question of wannabe I can't help but observe that we didn't need a World War to stop Hitler. We just needed all who claimed to be Christians in Germany to obey God as ruler rather than man. We would not have had any of the wicked things done to Jews, gypsies, homosexuals or even Jehovah's Witnesses. When Christians follow the command to love instead of the command to kill it can stop a lot of bad things from happening. It can't change everything in the world but Hitler would not have had an army.
Maybe I did address wannabe's question after all?