I read the discussion on FB. Long discussion, but narrow, not broad. Singular viewpoint.

But I have my own concerns about the study, not that it isn't meaningful, but that it means what the article thinks it does.

I perceive a human need that (part of) religion addresses. When that need isn't met, it leaves a population subject to some sort of revival effort, normally much longer on enthusiasm than thought. Like a teenage crush. Such a population is particularly subject to abusive manipulation. It will be interesting to see how these societies that are increasingly identifying as secular evolve.