Humans are born with a hard-wired morality: a sense of good and evil is bred in the bone. I know this claim might sound outlandish, but it's supported now by research in several laboratories.
Any simple claim that you need religion to be good is flat wrong.
A sympathetic parent might see the spark of consciousness in a baby's large eyes and eagerly accept the popular claim that babies are wonderful learners, but it is hard to avoid the impression that they begin as ignorant as bread loaves.