Is there good evidence behind this view? I don’t mean to be rude, but I’ve only seen it from reactionary commentators and right-leaning news outlets.
Many people seem to disagree with the ruling on emotional grounds though.
That said, to think that this matters is pretty nuts. In the entire western world today, the structural environment on the extreme left is strongly opposed to the idea of campus, while on the extreme right the idea is welcomed by a critical mass.
In other words, the left polices itself. The right doesn't.