I'm not sure how this pair ended up in The Federalist, supposedly a publication for conservative intellectuals. Their article seems to be a promotion of their book on the same subject, which it's interesting to note, the Family Research Council and Life Site News gush over. The authors quote both groups in their book promotions.

Both groups are over-the-top extremist, calling for criminalizing homosexuality and repeatedly promoting scaremongering lies about LGBTQ people. FRC is so extremist that the Southern Poverty Law Center calls them a hate group.

Hate group seems a funny sort of association for a pair of Christian writers.

Seems a funny sort of association for a publication like The Federalist, for that matter. The book, which argues that gay people should not be allowed to adopt or care for children, because gay people are bad for children, has been dismissed by pretty much everyone serious as lacking data or intellectual seriousness. The book ignores vast amounts of data that show children raised by same-sex couples do as well or better than children raised by opposite-sex couples. The authors don't even wave the data away with rhetorical sleight of hand. They just pretend it doesn't exist.

Their article barely rises to the standard a high school composition teacher would award a passing mark. It's all appeals to emotion and unexplained sketches of theology, some of which don't even fit in with one of the author's religious beliefs. (She cites Natural Law, which is considered heresy in her own faith tradition.)

In short, the article is a complete mess. The only reason I can see that The Federalist accepted it is that conservative intellectuals have circled the wagons around LGBTQ issues just like conservative Christians have.

And they don't really care if their arguments make sense. It's all about the hate.