Good. Rob him, and then tell him not to worry, cause "Theft" is a "social issue."
In a morality free society, the right to keep what you own also disappears.
Maybe homosexual marriage in and of itself is not the hill to die on. But homosexual marriage has paved the way for the rest of the LGBT agenda, including trans people in bathrooms of the opposite sex.
I would also question about whether you want to die on a hill for a certain cause. Homosexual marriage is a fact in our secular world, but, it’s just a matter of time until we see churches getting sued over marriage.