Indulge me while I paint with a broad brush. Most people are either religious or non-religious. Among the religious, quite a few believe their religion is the one true religion. Consequently, those outside their tradition are unsaved or infidels and doomed to eternal damnation.
This “zero-sum, sheeps and goats” line of religious thinking might make a modicum of sense if there was a genuine free-market of religious ideas from which each adult chose once they had considered a wide-ranging smorgasbord. A grand religious meritocracy if you will where the most enlightened, hopeful, helpful religions would probably hold claim to the most adherents.
But that’s not even close to how religious people “choose their religion”. People’s religious choices are mostly the result of where they’re born. And I don’t know about you, but I had no control over where I was born (shout out to my faithful following in Boise, ID). Born in Northern Nigeria, one’s almost certainly a Moslem; Southern Nigeria, a Christian; central India, a Hindu; Israel, a Jew; Alabama, a Southern Baptist: Utah, a Mormon. In fact, do people choose their religion or does their family’s religion or the predominant religion where they grow up tend to choose them?
If religious identities are rooted in geography and culture, “zero-sum, sheep and goat, mine is the one true religion” belief only makes sense if some countries and cultures are special, divinely created, better than the rest. And why trust anyone who believes they won the birthplace lottery of life about religion or anything else?