A generational gap in affiliation is growing among Americaâs most devout demographic. Kate Shellnutt| Image: Jon Cherry / Getty Images Black Americans of all ages are more Christian than the rest of the country, but leaders say it’s getting harder for younger generations—who are frustrated with racial injustice in the church and are increasingly influenced by secular voices—to keep the faith. The gap between the beliefs of parents and grandparents and their kids is wider in the black community than the country as a whole, according to new data released today by Barna Group. Around two-thirds of black millennials and Gen Z identify as Christian, 10 percentage points fewer than black Gen Xers and 20 percentage points fewer than black Boomers—about double the difference in faith found between younger and older Americans overall.