I thought Catholics were not supposed to marry non-Catholics?
I do not know a lot about Catholics please don't bite my head off! :)
No, it's allowed, but, speaking from my experience, it ain't smart.
The Catholic Church wants you to raise the children Catholic but you can marry someone of any religion you please.
The advice about a Catholic woman not marrying a Muslim man and moving to a Muslim country is not religious advice but good common sense advice that would apply equally well to Protestant, Jewish, Hindu, Buddhist, pagan tree worshipper or atheist women.