What is the greatest sin you've done in your life?

https://jlai.lu/post/913345

What is the greatest sin you've done in your life? - jlai.lu

Apparently not believing in God. My first introduction to the true mind of religious people was in the 4th grade when a classmate told me “I’m sorry you’re going to burn in hell forever” when I told her I was an atheist.
The proper response to that is “At least I’ll be in good company.”