It is safe to assume that one’s beliefs will most likely be based on where one was raised, what their parents believe, and what their culture believes.
If one is born in America, they will most likely be Christian. If one is born in India, they will most likely be Hindu. If one is born in China, they will most likely be Christian or Buddhist. Of course, it’s not a guarantee, and there will always be a select few who dismiss their belief later on in life, but generally speaking, there is a much higher chance that growing up in the culture, they will be the religion of that culture.
So it is safe to assume that had all of the Christians in American been raised in India, the majority of them would be Hindu. If the majority grew up in Mexico, the majority would be Catholic.
It is also safe to conclude that the strength of one’s faith has nothing to do with the validity of the religion. The majority of those who succumb to their culture and take on the belief system of that culture’s primary religion will believe that religion just as strongly as another raised in a different culture. It can be agreed the strength of one’s belief has less to do with the logic of the religion, and more to do with simply being raised in that specific culture.
So let’s assume for a moment that the entire planet’s main religion was Buddhism. Undoubtedly, the majority of people born would be Buddhist. Yes, there would be a very small, select few who would branch off to other faiths, but simply based on every other nation in the world whose population consistently remains the same religion, it would make sense that the majority of the world would remain Buddhist. Of course, the majority of the world’s faith in this belief system would be unshakeable.
Knowing that one’s belief is much more dependent on where one grows up than any other factor in the majority of cases, would it not also be safe to assume that the belief came first, and the reasons for believing came next? In other words, the means were found to satisfy the end, as opposed to the end being derived from the means? Is it more logical to find means that satisfy the end, or an end to satisfy the means? How can one feel so unshakeable about their belief, knowing the most likely reason that one believes what one does is simply because of where one grows up, and the culture they were raised in? How can one feel so sure that their faith is correct, when it is also easy to see that everybody feels their faith is equally correct (otherwise they wouldn’t believe it), and the only difference in belief is simply where one is raised?