Perhaps it was just a gaffe. But Barry keeps making a lot of them and he doesn't look all that confident about himself. There has to be some doubt he's a Christian. He doesn't need Steffy to get it right for him!
"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus