"This is not a Christian crisis of concern only to Christians," Cardinal Wuerl said. "This is a human crisis."

Pope Francis will be in Egypt for two days beginning on April 28.

In Europe the Christian population is dying faster than it is being replaced. In North America, the number of Christian deaths will begin to exceed the number of births to Christian parents by around 2050.

The polarizing campaign gave hard-line Islamic groups a national stage and has undermined Indonesia's reputation for practicing a moderate form of Islam.

Three in 10 Catholics admit to having unfavorable views about Muslims, Catholics are less likely than other Americans to know a Muslim personally, and nearly 50 percent of Catholics can't name any similarities between Catholicism and Islam.

At the risk of sounding patronizing, I have no doubt that the Reverend Graham’s faith is deeply felt and that his views are sincerely held.