How is what this student says materially different from what many churches do to gay people:
"As long as they aren't sitting there and kissing on the dance floor and grinding on each other, stuff like that, I don't have a problem with that," he said. "I don't see what's wrong with it. Prom is for everybody. It's a high school experience."
Such restrictions are not placed on straight students in the same way. Yes, parents, teachers and administrators may break up the kiss-fest on the dance floor at the prom going on between a opposite-sex couple, but the sentiment expressed in that quote isn't about that. He's saying that gay students should be invited in because they are students just like other students, but that they really aren't equal and shouldn't be viewed as such, even if he isn't trying to be hostile or mean.
Many churches also say they want gay people in their pews, but don't want them onstage or in leadership or other visible positions - unless that gay person is renouncing his gayness or declaring celibacy or saying he has been "cured" and has decided to marry someone of the opposite sex. In other words, they only want gay people there - as long as they don't act like themselves.