said by a rabbi in the Mishnah
To dissatisfied and religious people this world is only a prelude to the bliss. Beyond a given point any frustration becomes unbearable and turns into aggression. Adherents of non-circumcising religions are less likely to kill in the name of their faiths. Contemporary Christians wonder how it is possible for one to sacrifice his life for an abstract cause or for a religious belief. Non-circumcising religions are less aggressive in defending their principles.