I thought it was fairly clear the sort of religious belief I was referring to from the examples I gave of behaviours with their origins in religious dogma... no?
If not - I'm not necessarily referring to any one religion, moreso a specific kind of religious belief.
It's possible for 2 adherents of the same religion on paper to follow the thread of religious belief to quite different levels of absurdity, for example.
Although for sure, one could make a case that certain religions are more or less likely to induce absurd behaviour. The big 3 Abrahamics have all lead to varying levels of insanity in the past, although the relative peaks of this absurdity have come at different times, there's one in particular that is visibly more absurd in certain parts of the world right now. I would say Christianity seems to have peaked in absurdity and modern iterations (for the most part) are fairly sanitised and not incompatible with secularism. The scale of absurdity has peaks and troughs all over the place though, obviously certain lesser known tribal religions seem to induce certain kinds of absurd barbarism that the Abrahamics never did - for example those that promote Female Genital Mutilation. Obviously Judaism has a form of "MGM" but this seems to be somewhat lower on the scale... but again, it's quite possible for any adherent of any religion to lean pretty far into the absurd, I'm sure, and I'm not really trying to make any argument that any religion is better or worse than any other in this regard. They're all different, and are all interpreted in a multitude of different ways.