Tolerance

Baseball Crank makes a good point:

Quite simply, college ensures that, at a fairly young age, most conservatives get the experience of being surrounded by people who vocally disagree with their political opinions, which teaches you to keep your head down a bit and stay civil. This is reinforced by the fact that a lot of us watch movies and listen to music made by people whose political opinions we find repugnant. I think a lot of liberals, particularly the more vocal ones on the internet who grew up in blue-state cities and went to blue-state colleges and got into blue-state occupations like the law or academia, just don't have the same formative experience of having had to reconcile themselves to political disagreements with people they otherwise like or respect, and it shows

Stuart Buck