People who want to be married in church ought to be Christians. That requires them to repent of sin. Not to be sinless, but to be repentant.
America does not rule God or the church of God. Do you support having homosexuals marry in church? What about transsexuals? After all, “This is America..land of the rich and poor, good and bad, sick and ill and we are all created EQUAL..”
have a good week-end and be sure to attend church of your choice on Sunday..