Is Christianity based on older myths?

[Mudhammam]

You know, I put myself in the shoes of a christian and wondered how I would argue that the bible is true, God exists and God is Yahweh.

I couldn't even get started. It must be incredibly frustrating.

At least not while keeping a straight face.

It's especially hilarious when you start reading the Egyptian, Sumerian, Akkadian, Hittite, etc. myths that predate the Bible by hundreds, if not thousands, of years, and hold in your hands literal and obvious evidence that Yahweh and the stories "he wrote" are simply additions to the evolving stock of fiction in man's history of tribal cults.

So far I've discovered:
- Egyptian and Sumerian creation myths in which the god(s) speaks things into existence, rests when finished, creates a paradise where beings never die, animals don't bite (the wolves don't hurt the lambs), fruit is eaten from plants, gods get angry, and place a curse upon the offender;
- Fights a sea serpent/dragon;
- The story of Joseph and Potiphar's wife paralleled in the earlier Story of Two Brothers;
- The god sends a flood to destroy mankind because of their sin, but the one righteous man is saved by a boat upon which he takes some animals;
- Cain and Able motifs (farmer god or king, vs shepherd god or king);

I'm also only on about page 50 of a 700 page book in which every document was selected for its relation to the Old Testament.

Has someone sued Yahweh yet because I'm starting to think he would wisely settle out of court.