So you don't think it affects children when nobody they know has the same last name as their parents? Then how about this example:
The homosexual movement is a direct descendant of the free love movement. My daughter is involved in an end-of-year performance where several of the kids' parents help out backstage. Yesterday one little girl came up to my daughter and said, "Guess what, my mommies are going to help you get dressed for the show?"
My marriage is stable. My daughter understands what love, sex, and marriage are. And two lesbians will be helping my daughter dress for a show. Maybe lesbians aren't as likely as gays to be predatory but I'm not happy about it.
Evil impacts everyone. It does so every time. And don't be mistaken - homosexuality is evil. It's not wrong, it's not a bad idea, it's not sick. It's evil.
We could argue about what love is. I note that from Matthew to Revelation it had nothing to do the state of the world.
And I will say to them, "I was hungry, and you did not feed me, I was naked and you did not clothe me, I was homeless and you did not give me shelter, I was sick or in prison and you did not visit me." (my own loose memory translation)
Let's add, "I was ensnared in a gross evil, and you did not try to help me see the truth."
Paul also explains why the government bears the sword on G-d's behalf - or are you presuming Christians should not be involved in something done on G-d's behalf.
BTW: I was in a bad mood this morning and I took it out on you - I'm sorry.
Shalom.
The Christian in the coliseum, about to be eaten by a lion, would not argue evil "had no effect" on him, but he would argue that evil has had no effect on his morals.
St. Paul suffered HUGE effects from the evil around him; he lost his freedom and then his life. But he did not regard being in chains and beheaded as a significant moral choice on his part.
The distinction is at the core of the entire New Testament. It is the very definition of Christian freedom.
Of course your children being around lesbians at school will affect them. But whether it affects them morally or not is a separate question, and entirely unrelated.
And the law is changing because there are lesbians. The law is not creating lesbians.
This entire subject is enough to tempt anyone to a foul mood. That the subject comes up affects me; my mood is my choice and the only part of the complex God judges me on.
The difference between the two is the line we're trying to draw. I value our exchange and offer my warmest respect, whether we agree or not in the end.
A simple answer: Don't send your daughter to places where she will mingle with people who do not share your values.