PITTSBURGH — Last September, Pastor Jason Howard of the Sanctuary Church in Pittsburgh saw a surge of young people flocking to his Christian congregation, the week after Charlie Kirk was murdered.

Howard knew that something had shifted. Yes, their congregation had always been predominantly youth-driven, but this was different. Lines began to form for their services. Public transportation was dropping off children by the busload from campuses across the city, and he knew that he had an obligation to expand. Howard teamed up with local college students at the University of Pittsburgh, and a revival called Pitt Purposes was held on campus, attracting about 600 students and led by members of the university’s football team.