For faculty members with extreme philosophical or political values, there is even greater paranoia. Even though tenure protects nut cases, incompetent, and no longer productive faculty, which costs the universities hundreds of thousands of dollars to terminate, other faculty members are still not persuaded that tenure should be diminished. The universities never seem to prevail in litigation between the institution and faculty members who were terminated for cause that involved reasons that you and I would feel were obvious and legitimate to terminate that professor. The “pro professor bias” created by tenure is for the most part impregnable.
Remember that tenure creates a lifetime employment contract between the university and the professor which in reality cannot be terminated by the university.