Too bad the thing you want hard data on is virtually impossible to accurately gather with any reliability. What I do know is that as a former fundamentalist evangelical xtian examining my own former in-group, there was a ton of active coordination to poison the well of our young minds against “the world,” which meant science, evolution, sex, role of women, higher education, and anyone who was not our flavor of christian. Most kids willfully mimicked their parents opinions, like I did. And of my then in-group, it seemed that for every handful of families, half of them had insane parents (domineering fathers and submissive mothers) that were very happy that the Bible gave a divine mandate/suggestion to beat their children to enforce compliance with the dictates of their faith.