I suspect the suspension is less about disagreeing with the policy and more about things like brain transplants from cats. That said, that, too, is a stupid reason to suspend someone.

What kills me is that this was a teachable moment. Audience! Think about who you're trying to persuade, and what tactics will work. Insulting those very people is not really a good idea. What should have happened was that Evan should have been required to rewrite it with arguments and tone that would (hypothetically) have made school admin listen.