Sorry, but I think it is you who do the generalizing about atheists. I am not speaking of communism, or other ideologies when I discuss atheism for these merely replace religion with another form of social control.

With or without religion, it is obviously preferable to seek "peace and harmony", but we are only conscious of this quest because such a goal is illusive. I argue that conflict is unfortunately a natural state for humanity and the divisiveness of organized religion (like other ideologies) re-ifies and even sanctifies such conflict. Those, such as Krishnamurti, who argue against organized religion/ideologies/nationalism do so from a cocoon of intellectualism and Western economic security.

Your "optimism" may be a more attractive modus vivendi to my "pessimism" but I suggest it only works in the homespun cocoon.