Marriage With Polytheists And With People Of The Book (Ahl-e-Kitab)
Marriage is a personal matter. If a Muslim does not bother about God’s prohibition of marrying a polytheist, it means he is not a conscious Muslim. Marriage is a social contract, so it will stay valid between the two independent people, who own their actions and care less about religion. No authority has to make their marriage fasid or batil. It is a fact that has taken place. This is a deviation like other deviations a Muslim can do, like drinking, adultery, eating something haram, etc.