I think that the other piece of it might be that people are not willing to do the work in their own traditions, and so flit in and out of other traditions, hoping to find an easy way to the divine. think that touching the divine is always work, and that novelty is sometimes mistaken for numinous.

There is a way in which Judaism feels congenial to cultural Christians, because they think they _know_ what Judaism is. These are often people who can't reliably distinguish between Protestant and Roman Catholic faith ways. It's easy to appropriate, hard to be devout.