My father is a Christian and so is my grandma. Under their influence, I began to go to church when I was very young. As I grew older, I got quite confused because God never replied to my prayer not even once. Then I realized that no one can actually prove that God exists and all Christians just remain loyal to Him and the Bible without any rational reasons. They want to believe in God so much that they are willing to forgive him for any kind of shit he does even genocide[via Quora]. So I decided to be an atheist based on two factors: 1. God does not exist. 2. The morality in Bible is too conservative to be the guideline of modern world.

However, if I tell my father about this, he will probably be mad at me.

Should I tell him?