Atheism is a faith in itself.Just as Theists believe in God, they do not believe in God.There is no reason for one to be intolerant of them.
Hinduism accords a a special place for Atheists .In Indian Philosophy, Atheist is not one who does not believe in God.Atheist is one who does not believe in the authenticity of the Vedas, the scripture of Hindus.One can be an atheist, yet accorded the respect due to his faith .In fact,Lord Rama,incarnation of God, discusses with Atheist monk Jabaali and imparts him Truth about Reality.He does not try to convert him to be a theist of the western sense ,that is believing in God.If one were to look into western history more harm has been done to society by the theists than the Atheists.Based on track record of Jews feud with Christians,Pagans with Christians and Jews,Crusades-all are the making of so called theists, not Atheists.Atheism, as said earlier, is a stand point.You either agree with it or do not agree with it. .Based on who has been harmful to society,it is the theists who should vacate.