The only condition for marriage that there is a consensus on by all Muslim scholars is Consent.
Everything else is just a symbol of consent that emphasizes it (like dowry and seegha and announcement), and seen by many scholars as unnecessary.
And the religion of the spouse is irrelevant if there will be no effect on the Muslim spouse’s faith.
With that, Islam might have presented the easiest way in the history of the world for marriage …. basically a consent in the heart. ❤️
All the complications are cultural and legal.
Wissam Charafeddine 