All religion is DEMONSTRABLY the invention of humanity; therefore, all the moral codes and Good & Evil are Atheist by default. Such an instinctive morality underwrites our familial / societal / tribal codes and relationships in terms of altruism and empathy; they are innate as language and music, and might be found in the Humanist Teachings of Jesus as the simple universal absolute of Do unto others as you would have them do unto you. This is something we struggle with for sure - after all the Good / Evil duality is encoded as deep as the Nature / Nurture debate - but it is something we also FEEL pretty deeply too.
If all religion is DEMONSTRABLY the invention of humanity, then DEMONSTRATE it to me. (I'm just borrowing your caps, pardon) I am ready and willing to debunk every other religion out there besides Christianity. There's only one God, only one truth. Nothing else fits.
The only way that you can say that religion is the product of humanity is to disapprove the existence of God. I agree with you, all world religions are concepts of men.......except for Christianity. Christianity was 'started' by God.
"All the moral codes of Good and Evil are atheistic by default"--well, if all other religions were false, then yes, the religion of atheism must be true. But how do you know that you're right? Were you there when the earth was created, so you can say "I definitely know that there is no God." Do you know everything? If you don't, then is it possible that you just don't see the evidence for God, and it really is there?
Of course consciousness of good and evil are ingrained in humans.(whether they suppress them or not/are conscious of the fact depends.) God put it there. Animals don't have a sense of good and evil--you don't see a wild jaguar looking guilty when he's found eating a human being. Only humans have 'ethics'. Only humans have souls that can never die. And that's because we were created in the image of God.