Whereas religious beliefs are thought to be in decline according to other researchers, e.g.,
https://blog.oup.com/2020/12/why-is-religion-suddenly-declining/.
Regardless - I fail to see the attraction of religion. Belief in some sort of afterlife and a supreme being rewarding those who are worthy? This exact sort of belief has recurred time after time - in Rome, in Greece, in Mesopotamia, numerous times in South America, in North America and so on and so forth. All such beliefs contradictory in substance and all without a shred of evidence. Humans fear death and wish desperately for some sort of life after death - ergo religion.
Frequently religious belief devolves into zealotry. Unbelievers are a threat - and so must be expunged. And thus, time after time, now and in the past, "Religion, a mediaeval form of unreason, when combined with 'modern' weaponry becomes a real threat to our freedoms." - I've quoted "modern" because the term is relative. A modern weapon in Roman times is a well-forged sword.