listen mate, i dunno about what they do in your religion, but for a muslim woman she cannot marry a man of another religion, he has to embrace islam, and if he doesnt her marriage is not valid!
A muslim woman, if she has imaan and faith in allah would not disown her religion and marry a kafir..
So yes they should only marry muslims...so what you trying to say that a muslim women should marry non muslims?
Go jump dude!