Most people are religious by nature of their parents because of their influence (church, bible from a young age etc) and only a small percent of people actually switch religions/become atheist or vise versa. Now if a hardcore Christian who believes other religions are not true was instead adopted at birth by a family who believes in Hinduism, wouldn't that person now be a hindu and not believe in Christianity? Christian believes in one god (or the trinity idk) and hinduism believes in tens of thousands of gods. The perspective on what religion is real and what you believe in depends on how you were influenced. religion fake news ( ͡° ʖ̯ ͡°)