They have the right to believe in their religion, just as much as you have the right to not follow one. Why do you want to take away their rights? The beauty of it is choice-- if you want to go there and follow their beliefs, you have the option. If not, go to one of the other 3000 schools in the country that don't give a flying f*** about who you have sex with.
If you can't tolerate other view points, how does that make you any better than those who follow control-based religions? Tolerance, and openness are the solutions to all religous-conflicts.