The point is extremely valid.

If religious prohibitions are dismissed for homosexuality, then why not polygamy, incest, and even bestiality? You have to take pedophilia off the table because of the lack of ability for informed consent, but all the others are totally morally equivalent to homosexuality--behaviors by consenting adults in private, wrong ONLY because various religions define them as wrong.

For whatever reason, the American left has singled out homosexuality as somehow more virtuous than the others. On what grounds? It would be interesting to hear what grounds from the leftists who think that way.