It has nothing to do with the percentage of homosexuals.
The left has just chosen them to be the current weapon in their goal of criminalizing Christianity.
Seems like the left is also utilizing Muslims in the same anti-Christian role. A better fit, too. Lefties & muzzies each adhere to an aggressive collectivistic ideology which hates Christianity and punishes those who stray or disagree.
Defenders of mega mosque construction are almost always lefties.
Faggies on the other hand have a built in disgust factor. Gayvasions of Chick Fil-A’s and gay lawfare against bakeries tend to create a majority backlash. It is normal of human nature to regard homosexuality with revulsion.