Who wrote the fate? Is not this interesting that atheists deny the existence of God and deep down they do know God exists who can control over them and who has written their fate?
I can’t speak for all atheists but my personal experience is that some people become atheists when they can’t find answer to their questions such as why is there so much suffering in the world if God is loving and merciful? Why people use religion to commit crimes one can never think of? Why establishes science and religions can’t agree, after all science is knowledge given by God? When they don’t find their answers to such simple questions, they get angry at God and reject the existence of God even though deep down they still believe in God. If you want to test an atheist believes in God or not, put him/ her in life threatening situation and you will find them sincerely praying to the God they have been rejecting throughout their lives.
Anyways in my experience when atheists reject the existence of God, it is only because they are angry at God and blame him for everything wrong which happened in their or other people’s lives. They still know God is real but they want proof and good reasoning. That’s why you find them debating with theists because unconsciously they are still looking for answers to their questions.