Holocaust Reflection

The Holocaust was one of those events that you never, ever, ever think would happen, but it did. It was a horrible time in world history, where millions of lives were lost.... just because of their religion. But I don't understand why they were hated so much? Why they were blamed for things that couldn't have possibly been their fault. But the biggest thing that I cant grasp my mind around... was how the Germans could possibly believe that what they were doing was right, to simply murder someone, just because of their religion, or just to simply murder someone at all is incredibly astounding to me.