Comments are welcome on other possible grounds, but the will to protect children from a system which stops them having a relationship with a mother and a father by preventing gay couples from marrying is, yes, homophobic.
Homophobes have a right to pick which child protection measure they support: just because they could campaign for greater protection for children in high risk families, does not mean they should campaign for my child protection issue of choice, rather than their own. But if they wish to prevent someone from having a child or raising his/her own child with the partner of his/her choice, a significant invasion of human rights, they should give clear proof that this gay parent can only produce worse outcomes than other parents permitted to raise children, when free of societal homophobia. Regnerus is not that. Or, they can ban divorce, and other things which separate people from both parents- and find how children flourish brought up by parents who co-exist in cold dislike. I have met awful married parents who damage their children- should mothers be psychologically evaluated before being allowed to conceive?
Religion should fit us to accept reality (a difficult thing for human beings, wishful thinking is so tempting) not to reject it. And so in Bible interpretation, we have a choice. We can believe with certain bible verses that the sun can literally go backwards in the sky over Palestine, and that slavery is God’s will, and (with a disputed interpretation of only six bible verses) that gay sex is always wrong, or we can believe that the Earth goes round the Sun, slavery is wrong, and gay sex is no more objectionable than straight sex. Some found the gap between their literal interpretation of the Bible, and scientific knowledge of the universe, so great that they retreated from reality, to their immense harm. Fortunately, Christianity does not require that, or it would die out.
So why don’t people see this? Because they have irrational prejudice against, disgust for, or yes fear of gay people.
Another short, definite post. Do say other reasons for campaigning against equal marriage or the right to bring up ones children, if you can, but I am at Buddhafield, camping, until the end of the month. Thanks to Askme for the challenge.