>>21422014this.
they'd just divide into shittier cults.
like, obviously we should make the muslims and the jews change, you know, stop murdering everyone they don't like.
but even if you could convince people to stop being christian, (which, the parents are doing a fine enough job of as it is, as you can plainly see. One generation of children with internet, and they're already considering other opinions.) the zoomer faggots who would be running around larping as catholic would just be joining musk style cults of personality instead of old timey, "listen to our god and get free stuff" cults.
fifty years post religion, you'd see a bajillion shitty personality cults, a handful of scientology style cults, and a whole lot more flat earthers and the like.