Excerpt:

Like Americans in many other religious groups, a substantial share of adults who were raised Muslim no longer identify as members of the faith. But, unlike some other faiths, Islam gains about as many converts as it loses.

About a quarter of adults who were raised Muslim (23%) no longer identify as members of the faith, roughly on par with the share of Americans who were raised Christian and no longer identify with Christianity (22%), according to a new analysis of the 2014 Religious Landscape Study. But while the share of American Muslim adults who are converts to Islam also is about one-quarter (23%), a much smaller share of current Christians (6%) are converts. In other words, Christianity as a whole loses more people than it gains from religious switching (conversions in both directions) in the U.S., while the net effect on Islam in America is a wash.


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