I suppose that the fundy logic goes something like this:
High-school, a couple comes out publically. Issue comes up in bible-study group, group agrees that said homosexuals are abominatons of god, freaks, monsters, and that just in case it is catching they should not sit next to them at lunch, they should not talk to them, that to associate with them in any way, shape, or form would be to condone their behavior*. Gay kid challenges a kid in the bible study group: “why are you shunning me?” and fundy kid says “because you are an abomimation of God, and you are going to burn in hell for your disgusting, vile actions.”
Is that harrasment? I don’t think so, but you can see how there is grey area there, and it is something that educators might worry about. I am not foud of this sort of feel-good legislation in any case, so I don’t have any strong emotions about the bill itself.
*I know not all Christians, and not even all fundamentalists, hold views that are this extreme. A little hyperbole makes the example more interesting.