From the Washington Post today :

Domestic abuse is hardly unique to Muslim immigrant communities; it is a sad fact of life in families of all backgrounds and origins. Yet, according to social workers, Islamic clerics and women’s advocates, women from Muslim-majority cultures face extra pressure to submit to violent husbands and intense social ostracism if they muster the courage to file charges or flee.
A major obstacle to recognizing and fighting abuse, experts said, can be Islam itself. The religion prizes female modesty and fidelity while allowing men to divorce at will and have several wives at once. Many Muslims also believe that men have the right to beat their wives. An often-quoted verse in the Koran says a husband may chastise a disobedient wife, but the phrasing in Arabic is open to several interpretations.
“Many batterers manipulate Islamic law or use its perceived authority to control their wives. A man who has the power to divorce can really twist the knife,” said Mazna Hussain, an attorney for abused women at the Tahirih Justice Center in Falls Church. “Muslim women want to be faithful to their religion, and the idea that you cannot disobey the word of God is very compelling, even if you are in an abusive relationship.”