IMHO this stance is hypocritical and self-serving. The university is established to serve the community, not dictate to the community what it may or may not do. The problem with indoctrination on campus now is that the public is beginning to become aware of it. This puts professors on the defensive, and all they can do is to continue to pretend that the problem is imaginary (the latest online issue of The Nation has a few articles that serve as examples of this thinking) or attack the messenger (a typical leftist tactic so common that professors don't even think twice when they use it).
It is a law of nature that for every action there is an equal and opposite reaction. IMHO academia is in mass denial that they deserve immunity to, or can indefinitely resist, blowback from community as a direct result of continued practices of political indoctrination on campus.
The problem is that the professors have allowed THEIR politics to intrude into the academy. If they won't fix it, then the politicians will have to.