Of course there is. Horowitz introduces an argument of whole cloth stating that Knight and, by proxy, Christian Conservatives are advocates of a totalitarian state.
It's a lie with no foundation created to avoid the argument that homosexuals do indeed have an agenda, a strawman.
Knight is either an advocate of totalitarian government intervention in citizens' sex lives, or he is not.
Horowitz need's to cite source, quotations, date and time to back up such an argument or basically sthu.