I like African spirituals too.  Grew up in New Orleans just a few blocks from a Black Baptist church and a would often bike over just to hear the music.  But there is nothing more ridiculous than a Catholic church full of white people "diggin' it" and trying so hard to look cool and "diverse" by singing old Black spirituals.  It's not that it's "cultural appropriation," it's that it's just plain ridiculous.  White people can't even clap right to their music.