Atheists believe that men are just really smart animals. The problem with anybody is that it is extraordinarily difficult to look beyond ones own bas self and objectively critique anybodies else's idea or ideals.
Our tendencies as men are to be subjective/objective or objective/subjective. Atheists almost in toto are thinking that if they are nothing but a smart animal then so to must be the rest of mankind.
Ergo they are smelling their own imperfections (shit).