Then, I ask of you, what is a sin? With your definition, it might help with some clarity... Not all atheists are malicious or have any evil intentions.
Not all the fundamentalists have evil intentions but they follow God's Law.
What is a sin for you?
cultural atheism behaves like a religion itself, they try to shove their stuff down other people's throats
If you don't put a subject in your post it is difficult that you will have an answer.
Best regards.