Forget about proving God, Is it man-made?
Somehow I am not surprised that common sense is a unknown concept to you.
Let's see, do dogs talk about god? Can't say I ever heard dogs talk about god. How about cats? Do cats go door to door selling their worthless god theories? I have seen them go door to door for food, but I have never seen a cat go door to door to shove their religious beliefs down a stranger's throats.
I have never rabbits write a book about gods, I have never seen a bird preaching about its messiah on TV. There is only one animal on this planet who cannot shut up about god, and strangely enough the collective conceptualize of god is a reflection of the narcissistic human mind. Because only humans are egotistical enough to actually believe, that not only do they know how everything was created, but that creator actually gives a shit about them.