It is worth noting that even tenured professors can get bashed around if they run afoul of the political correctness mania that rules on many campuses. Consider the David Deming case.

I don’t think that tenure is a good answer to ideological overreactions by administrators. Instead, institutions ought to be pushed (by concerned faculty members, trustees, alumni) to adopt policies against the mistreatment of anyone on grounds of having offended someone. Having such policies might not do more than tenure does to stiffen administrative backbones when the “Off with his head!” cry goes up from students or other faculty members, but it’s worth a try.