That's a very broad statement or question.
According to the Christian Bible, atheists ARE more forgiving than the God of the Bible.
For example: We can forgive people who do things we did not want them to do, and we can do it WITHOUT requiring OUR firstborn or only begotten son to be slowly tortured to death.
Christians claim that Jesus of Nazareth HAD to die,slowly and horribly, because that is the ONLY way by which the God of the Bible could be satisfied.
I cannot be a Christian, because I would be embarrassed to admit that MY God, while SMART enough to Intelligently Design an entire UNIVERSE, was at the same time TOO F[intercourse]ING STUPID to think up a NON-violent way to forgive people who pissed Him off.