The war wasn't entierly Hitler's fault. The allies policy of appeasement, and the failure of the League of Nations made Hitler feel like he could do what he wanted. He was like a new user on the forums when all the mods were off. He had fun.
In fact, he didn't make most of the decisions. When presented with a choice, he would go to his cabinet and tell them "You decide, and tell me what you've chosen. I'll tell the people." Also, the unfair treatment of Germany following WWI cause hyper-inflation. The German people were incredibly poor and incredibly uneducated. When Hitler rose to power, he became a dictator. They were used to a monarchy beforehand, so this wasn't much of a change. The Weimar republic, the party that held power before Hitler, was hated as they were the ones that signed the Treaty of Versailles. That republic, Joseph Stalin, and a large amount of bankers were Jewish. Hitler saw this as more than a coincidence. In all reality, I fully condone pretty much every action Hitler had except for his anti-semitism. Even then, Japanese Canadians and Japanese Americans were persecuted and sent to internment camps after Pearl Harbour, so it really wasn't an isolated incident.