A religion is a set of metaphysical answers, descriptions and philosophies that are assumed true.

So Nietczche, Kant, Aristotle, and all the other many philosophers of metaphysics are actually religious founders and all that agree with their teachings are members of that religion?

I agree with you, so to put it in other words, Buddhism is certainly a religion in some places because they've interpreted the teachings literally and might even worship them. (Although you have yet to proven any actual worship it really doesn't matter if some Buddhists take the teachings literally)

And I'm not going to prove kharma is a real supernatural force, because it's not, that's what I've been saying. There is no magical force that's bound and no one wants you to literally believe that and nowhere is it written that you need to take this stuff literally because that wasn't the purpose of it, again it serves as a metaphorical teaching device and nothing more.

What does kharma teach you?

Kharma is the law of cause and effect, it not only serves as a moral guideline but also follows general principles of psychology. When you do good, good flows back to you, when you do bad, bad flows to you, when you think good thoughts, good flows to you, when you think bad thoughts, bad flows to you.

I'm not saying there's a magical scorebook out there that counts your good karma points out there and when you hit a certain number you get a prize, but when you do good and think good thoughts you feel good, and when you feel good (which is a reward in itself), good things happen to you. A good person is more approachable and generally more doors will open to a person that does good and therefore feels good. When you do bad, and think badly, you will feel bad, and when you feel bad people will tend to avoid you. Negative only brings negative into the world and positive only brings positive.

What is your definition of kharma and why do you believe taking it literally as a supernatural force is essential to being a Buddhist?