If a student group wanted to host a panel debate on whether gay marriage was good for society, with speakers for and against, at which of these schools would you get the most resistance? I organized such an event at one of these three schools, and was called a bigot just for asking the question. We had a protest outside the building and students organized a plan to shout down the conservative speakers whenever they began to comment.
BYU isn't even in the same sphere of closed-mindedness as these other two schools, speaking collectively and not individually.