Some years ago, I stopped worshiping god, going to temple, believing in caste and religion.
I never complained or complain about people who did those things I stopped doing.
Few call me an atheist and few call me agnostic.
What am I? 
A Cultured Clown's perceptions – ஒரு நாகரீக கோமாளியின் பார்வைகள்
I would highly suggest for you, and any one else interested to read the book ““The Devil’s Delusion: Atheism and its Scientific Pretensions.” by self-professed secular Jew and mathematics/philosophies teacher David Berlinski.
This tells the story of a Jew who was forced to dig his own grave prior to being shot by a German soldier. Prior to being shot, the old Jewish man advised the German that “God is watching what you are doing.” The Jewish gentleman pointed what i think is the real problem with atheism. “If you have the time please check the book out