You are correct, because the church is becoming increasingly racist and misogynist as well, which is driving away white Millennials who have very inclusive friendship groups. The numbers of young people in Black churches has only lessened slightly, because we mostly still find church useful, but a lot of us have left because we want to partake in more ancestral (African) religions, and there is a rift occurring between older folk who attend church and younger folk who want to get in touch with their roots and are rejecting Christianity.