Usery (interest) is expressly forbidden in the New testament, so Christians couldn’t give loans with interest. That’s where the bad old banker stereotype for Jews comes from, as well, I imagine, as the bad old stereotypes of Jews as the wealthy elite secretly controlling society. They were, essentially, the finance bros of the geopolitical reality in old Europe, because nobody else could issue loans with interest. If we want to “get back to Christian values”, then we need to ban charging interest.