Christianity has an image problem. Christians are supposed to represent Christ to the world. But according to the latest report card, something has gone terribly wrong. Using descriptions like "hypocritical," "insensitive," and "judgmental," young Americans share an impression of Christians that's nothing short of . . . unChristian.

Groundbreaking research into the perceptions of people aged 16-29 reveals that Christians have taken several giant steps backward in one of their most important assignments. The surprising details of the study, commissioned by the Fermi Project and...