Because religion taught kids to tell my son, "I'll kill you at next recess". " you are the dumbest kid ever". " you're going to hell." All because they know he doesn't share their beliefs. What a disgusting way to talk to another child!
People whose daily lives are empty and colorless are readily religious. This is comprehensible and pardonable, but they have no right to demand that others, whose daily lives are not empty and colorless, should be religious also. ~ Neitzsche