Hardline Christian monotheism shares a common front with hardline atheism: both sides are keen on asserting that gods don't exist. The Christian missionary steamrolls into a strange land and tells the people, "Everything you believe is a lie; there's only one correct source for cosmic truth." Obnoxious atheists merely mimic this behavior, only with a different notion of the "one correct source", and they offer far less in exchange for the trashing of old beliefs. ~Chara
