And my ultimate point was, that each and every religious community is convinced that their faith represents the truth. And each is equally convinced that all others are false. And that each is comprised of individuals who (by an overwhelming majority) acquired their faith as a consequence of the indoctrination they recieved in their youth.
And that the odds are that any member of a given religious community, would be every bit as convinced of the "truth" of a faith he now recognizes as false, if that had been the faith he was indoctrinated into as a child.
My comments have nothing to do with the objective truth or falsehood of any of these faiths. Simply an observation.
If that were always true, then Christianity would not be nearly so popular as it is. I submit that it is sometimes true, especially in cases where choice is not permitted or is punished. This is the main reason that Islam has not gained many converts. But the spread of Christianity shows that your principle is not always true.