Neither the gay nor the ally community has been free of having to deal with the "ick factor," and there is just as much trans homophobia as there is gay transphobia, in my experience. Just as racism goes both ways, but is far more significant when directed against the powerless, gay transphobia is far more dangerous than trans homophobia.
Congress's repeal of "Don't Ask, Don't Tell" was a watershed moment that ended institutionalized discrimination unjustly targeting gay, lesbian and bisexual service members. Yet thousands of service members who were discharged because of their sexual orientation still bear the scars of that discrimination.
In the Mormon view, children are not cursed by any "original sin" and children are not responsible for the sins of their parents -- until now. Despite of the Church's inept attempts to justify this policy, many Mormons and non-Mormons, are seeing it as punishing the children for the "sins" of their LGBT parents.