Could you imagine what would happen to a Christian professor if she made the claim that Mohammed wasn't a profit? Besides the school firing the professor the professor would also be in danger because of Islamic radicals. Then there's the fact that whether or not you believe Jesus was the Son of God, there's absolutely no doubt from a historical perspective that someone named Jesus was crucified.
So regardless of everything else, the professor is an idiot and misleading her students. Shouldn't this alone be considered in reference to a potential suspension?