We can know Christianity best when seen in a historical perspective. We too know ourselves when we understand our history. It would stand that through a combination of Biblical understanding and Historical/Archeological knowledge we would come closer to the truth.
Recently findings at Göbekli Tepe suggest that religion came first and possibly was the cause of civilization. The location of this site is near the geographical birth place of Abraham. Here are found the first Temples build by Neolithic man.
All this would further suggest that the people of Israel originally come from this region. This is the region of the Assyrian, the religion of Noah and Mount Arrant, the region of the religion of the one God Ahura Mazda.
The Judeo/Christian story is fully rooted from Egypt and the subsequent land of Canaan. Through the solid extension of Christianity into the lands of Noah and Abraham one see's the connection of Mithraism , Egyptian symbols and the evolution of the modern Christianity we hold today.