I'm inclined to say that Muhammad ys"v sr"y was even worse than Hitler ys"v sr"y.
As horrific as Hitler was, he never claimed that God told him to do his evil deeds. Muhammad attributed everything (pedophilia, incest, rape, genocide, mass murder, slavery) to a deity. And Islam is also inherently anti-Semitic. Muhammad was far worse than Hitler. We succeeded in defeating Nazism and now people who adhere to that sick ideology are just a marginal fringe group. Can you say the same thing about Islam? I don't think so.