Because "College" hates the GOP!
People, this is just basic, basic politics. An overwhelming majority of college professors are liberals. They vote for and contribute to the Democratic Party almost exclusively. It is widely perceived that professors spend much of their time inculcating liberal ideas into their students' unformed brains.
The reason the GOP hates college is the same reason why they hate Unions. Both are bastions of support for the Democratic Party.
It's amazing to me that liberals can't or won't see this. College professors and administrators backed the wrong side (at least for now). They didn't play it down the middle. They put all their eggs in one political basket and now, hey, payback's a bitch.
Of course, this is a shame because a college degree has perhaps never been more valuable. It is truly amazing that, even as the share of young people attending college rose steadily, so did the college wage premium.