The Vatican warning is directed to Catholic women. What about Catholic men who may marry Muslim women? Not a problem: such marriages are forbidden by Islamic law.
The Vatican will probably get lambasted for intolerance over this; Reuters tut-tuts the Catholics in this "news" story ("likely to fuel mistrust between the world's two largest religions"). But in light of Sura 4:34 (which sanctions wife-beating) of the Qur'an and other elements of Islamic law regarding women, it's entirely reasonable.
VATICAN CITY (Reuters) - The Vatican warned Catholic women on Friday to think hard before marrying a Muslim and urged Muslims to show more respect for human rights, gender equality and democracy.
Calling women "the least protected member of the Muslim family," it spoke of the "bitter experience" western Catholics had with Muslim husbands, especially if they married outside the Islamic world and later moved to his country of origin.
The comments in a document about migrants around the world were preceded by remarks about points of agreement between Christians and Muslims but they seemed likely to fuel mistrust between the world's two largest religions.
The document said the Church discouraged marriages between believers in traditionally Catholic countries and non-Christian migrants.
It hoped Muslims would show "a growing awareness that fundamental liberties, the inviolable rights of the person, the equal dignity of man and woman, the democratic principle of government and the healthy lay character of the state are principles that cannot be surrendered."
When a Catholic woman and Muslim man wanted to marry, it said, "bitter experience teaches us that a particularly careful and in-depth preparation is called for." ...
If the marriage is registered in the consulate of a Muslim country, the document said, the Catholic must be careful not to sign a document or swear an oath including the shahada, the Islamic profession of faith, which would amount to converting. ...
The document highlighted the contrasting approaches the Vatican has taken in recent years toward Islam, which has emerged as a strong rival for souls, especially in Africa.
Pope John Paul has broken ground in dialogue with Muslims and even prayed in a mosque in Damascus. He won plaudits in the Muslim world for his strong opposition to the Iraq war.
But Vatican officials and leading Catholic prelates have expressed increasingly critical views about the spread of Islam and the challenge this poses for Catholicism.
The Vatican's top theologian, Cardinal Joseph Ratzinger, said earlier this week the West "no longer loves itself" and so was unable to respond to the challenge of Islam, which was growing because it expressed "greater spiritual energy."