Irrational? Yes, the idea that the government would condone sodomy is irrational! The fact that they would limit the benefits and responsibilities to one man one woman marriage is completely rational.
This guy is out of his gourd. Irrational is not a Constitutional notion!
The meaning of “normal” marriage has deteriorated for decades. “Gay marriage” is an imitation that only became possible because what it purported to imitate became an empty shell.