Just a correction, although some would undoubtedly disagree with me, but "atheism" is not necessarily the belief that god does not exist, but rather just the not holding of the belief that god does exist.Atheism is not an evil ‘concept.’ It is merely the belief that a god does not exist, and instead, that humanity is responsible for humanity. There is beauty in letting go of the trappings of religiousness, and embracing the authenticity of living a very human life.
Myself, I am an agnostic atheist - I don't go so far as to believe that God does not exist, although in practical aspects they are similar, the main difference generally only being while actually discussing the matter.
Anyhoo, whichever way you want to use the term "atheist", just a suggestion that you make it clear in any discussions so as to avoid any confusion / disagreements as a result.