No serious scholar believes Abraham existed 1800 years ago.Formed: Though the Jewish calendar goes back more than 5000 years, most scholars date the beginning of the religion of the Israelites to their forefather in faith, Abraham, whose life is generally dated to circa 2000-1800 B.C.E. taken from http://www.patheos.com/Library/Judaism.html amongst other sites that all have the same date and statement. You're pathetic.
"The Bible's internal chronology places Abraham around 2000 BCE. Despite this, "there is nothing specific in the Genesis stories that can be definitively related to known history in or around Canaan in the early second millennium B.C.E."[3] As a result, "it is now widely agreed that the so-called 'patriarchal/ancestral period' is a later literary construct, not a period in the actual history of the ancient world" (Professor Paula McNutt).[4] "The majority of scholars believe that the Pentateuch was composed in the Persian period (roughly 520–320 BCE),[5] as a result of tensions between the Jewish landowners who had stayed in Judah during the Babylonian captivity and claimed Abraham as the "father" through whom they traced their right to the land, and the returning "Priestly" exiles who based their claim to dominance on Moses and the Exodus tradition."[6]"
Further, people lived in the area of Palestine for thousands of years before Judaism was formulated. And it was formulated through a mixture of other religions that existed at the time. Judaism was not the first, not the second, not even the third religion. It's just another religion and its adherents have no more claim to that area than any of the other religions that came before it or after it.
Try not being a fanatic.