Luckily my parents were the ones who taught me to question religion. But I do have a friend who had been in a similar situation, and his approach of attempting a peaceful resolution didn't go well, basically since the "revelation", anything he did seemed flawed to his parents, they were and are convinced that they have failed their son and there's no saving him anymore.....sigh!
My personal advice to you is give them some space for now to calm down a bit, then let them help you find the answers to your questions which led you to be an atheist.
My personal advice to you is give them some space for now to calm down a bit, then let them help you find the answers to your questions which led you to be an atheist.