Not sure where most of that came from. Certainly I don't agree with slapping hate or lemming or any other labels on parents who decide not to allow their kids to participate. Perhaps parents are simply alarmed at the idea of subterfuge when it comes to their kids. After all, trying to sneak under the radar is only necessary if you're trying to get away with something. Of course this is all supposition that there was indeed a gay agenda being sneaked in behind the anti-bullying figleaf. If that's not the case then it's difficult to understand why anybody would invent such a thing. It does look as if there has been some argy-bargy between the 2 parties for a while. I also see that the promoters of the mix it up day recently threatened to sue a school for not being supportive of gay students. There may be more to this than meets the eye.
As for the rest of the labeling etc: while nobody would deny that those with gay affect may be bullied, resulting suicides and community hand-wringing more often involves heterosexual girls accused of promiscuity. Seems to me that deviating attention away from those most at risk of killing themselves and towards some other group, would need more justification than an "everybody knows" argument. JMHO.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1