The Atheists should try forgiveness and see how itakes them feel

Those that believe in Christian mercy, love and eternal life may have a monopoly on heaven and salvation but we don't necessarily have a monopoly on the concept of forgiving those that have trespassed against us.

Atheists, next time someone wrongs you, instead of responding with spite and malice and becoming fixated on revenge, try instead to forgive the person who wronged you. Try and turn your mind to more pleasant things. Becoming obsessed with revenge will make you look older (because of stress hormones) and you will be emotionally unbalanced. But if you can forgive someone, you will find a measure of piece that might over time grow and change you as a person in a positive way that you may find surprising.