Gay marriage in outer space - homosexual aliens who don't understand

I'm writing a story about a highly advanced humanoid alien
civilization who are
all gay, males do marry males and raise male children while the
females
do marry females and raise female children.

These extraterrestrials arrive on planet Earth, happy to share their
wisdom,
but soon they discover that most humans hate homosexuals. They decide
that they can't share their knowledge with a species that hates people
just
because of sexual orientation.

Anti-gay activists start to call the aliens "demons", a small group
even plans
a terrorist attack against one of their spaceships.

Will humans, because of anti-gay bigotry lose one of the biggest
chances in
history? Will humans scare away these peaceful gay aliens? Or will
humans
accept homosexuality as a lifestyle?

What do you think about that premise?