Academic freedom is an especially important subset of free speech. If universities place limitations on what academics can study, whole areas of knowledge could be closed off. That's why I signed the petition for Dr. Noah Carl, and it's why you should, too.
Remember, when a mob demands censorship, it's easy to hope that capitulating "just this one time" will make the problem go away. It won't. It will only lead to more severe demands for censorship in the future.