I was told that every old culture, like the Egyptians, made their own idols so the people could do whatever they pleased without any morals, and it always ended up so they could do bad things like child sacrifice. They also said that every pagan god is either about sex or war, because that's what every person if they aren't given morals.
It probably shouldn't need saying, but Christians aren't the only people with morals - often, as with any group, they don't fit into that category at all.