Ban on muslim women marrying kafir (unbeliever)
Question

                Can a non-muslim man marry a muslim woman?
Praise be to Allah.It is absolutely not permissible under any circumstances in Islamic law (shari'a) of Allah, 
the most esteemed and exhalted, for a non-Muslim to marry a Muslim woman, as per 
what He has said regarding the marriage of a kafir (unbeliever) to a Muslim woman and 
vice versa: (interpretation of the meaning).
They are not lawful (wives) for the unbelievers, nor are the unbelievers lawful 
(husbands) for them... (Al-Mumtahina:10)
And Allah the most esteemed and exhalted has also said (interpretation of the meaning):
Nor marry (your girls) to unbelievers until they believe... (Al-Baqara:221)
i.e., it is not ever permissable for someone to marry his Muslim daughter or sister or any 
Muslim woman for whom he is a guardian to a kafir.
Islam must be exhalted and cannot be subjugated, so how could a Muslim woman be 
put under the care of a kafir man, when the man is normally naturally in a stronger 
position? In such a situation he could cause her to corrupt the practice of her religion or 
force her into subdual by causing her to live a life of oppression with him. He could also 
prevent her from practicing some of her religious rites. These are among the reasons for 
the aforementioned ban expressed in the previous ayaat. wallahu a'lam (and Allah is the 
most knowledgable).