Atheism or no Trust or belief in Creator lead peoples to believe in themselves, Its create a scenario of the world or reality what have no meaning and purpose.
Humanity or society originated on the belief of Higher existence and Set of religious rules.
If you suddenly lost the belief that someone created you, You will fell the emptiness inside you and in the whole world.
The emptiness let many atheist aggressive in religious views or behave like a religious extremist, who do not have a logical reason.
Look at the night sky or see some Hubble telescope images or documentary about the cosmic world – Hope the vastness and emptiness of space will lead you to an answer.
To You , If you Lost The Faith in Creator