Quite a bit of drama over a prom canceling.
You'd think someone was tied to a whipping pole.
Nothing quite like making a mountain out of a mole hill.
Well, now, a senior prom is the last big dance of a student's high school career. We can debate how important that is, but that's a subject for another thread. Whatever you might think about it, I guarantee you it's a big deal to the affected students and to the school. And the social attitudes that are revealed by the fact that a school would cancel such an event rather than allow a lesbian couple to attend are pretty important.
How did racial discrimination get brought into this?
Because discrimination is wrong no matter why it's done. Racial discrimination is simply a clear example that few would argue with (at least, not in public - I wouldn't care to guess about you in private). Essentially the issue is, if it's wrong to forbid, for example, interracial couples from a prom, then why isn't it wrong to forbid same-sex couples?
The obvious answer is, "It is wrong."
Do Catholic schools discriminate because they require a uniform?
Catholic schools don't spend public money on those policies. And sexual orientation isn't something that you can take off and put on like a suit of clothes.
This is why a dress code is not discriminatory in and of itself, although it does restrict free expression, and as a result does have Constitutional limits. But clothes are something you wear, not something you are. Hence the analogy to racial discrimination.
At one time, Mississippi schools forbade black and white students from dating each other. Now, one could look at that and say, "If a black boy wants to date, he can date a girl of his race, just like a white boy can. Everyone has the same rights here, so how is that discrimination?" And in a similar way the two girls in this case could just date boys, same as straight girls could.
It's discrimination because it's hiding behind a little lie. It's pretending that what's important is dating someone - anyone. If that were the real issue, then it wouldn't matter - just find someone of your own race, or someone of the opposite sex. They're all the same anyway, right?
Well, no. The real issue is being able to date the person you care about, regardless of the color of their skin or what they carry between their legs. Any reasonably intelligent person understands that, but talking about "special rights" can distract someone who isn't paying attention.
There are discrimination issues in the world that are much more important than a couple of whiny white lesbos in Mississippi.
Ah, that sentence explains a lot about your attitude. And the sad part is you probably don't know why.