(A is better than B) is usually a sign of immaturity.  It is not childish to talk about religion, but we often talk and think about religion in a very unappealing manner.

For everyone(or almost), religion is rooted/founded and almost unchangeable. People often attempt to persuade others that their religion is "correct", and others "wrong"

Do not forget the reason you follow your religion, each word in the holy book is important, do not forget the overall idea.

Amicable discussions are a better way of resolving the questions we have about religion
The purpose of religion and/or its foundation is often mis-interpreted by mere humans, but we aren't perfect.

If you seek to expand your mind, sure you'll probably learn. If you attempt to contradict/raise provocative questions, you'll open a can of worms.
Let he who has a mind think, he who has eyes see, and he who has ears listen.