Dr. H, thats true what you say of the two coming from the one. However, even Judaism did not start the organized movement. I can make an argument using the Hindu's and Egyptians
Negative my friend!
Judaism has its roots firmly placed in organized religion, not buy man but by God. If you want to separate the meat from the bone “Notice”
Judaism, to began with, the “Jews’” their traditional ancestors are Hebrews [God’s chosen people]. This name comes from “Eber,” {ay'-ber} (Genesis 10:21) which means those that crossed dedicate, devote, over or "the region beyond" We can go back even further to the name “Shem,” a son of Noah. Noah and his sons were organized in their religion, [handed down from Shem] in fact we can go back to Adam, he and his family [Eve, Cain, Abel, Shem and their other Sons and Daughters] was organized in t heir religion [dedication to God].
How did the “Hebrew” become Jews? After t he death of King Solomon [922 B.C.] the nation of Israel was torn apart by a civil war. It ended with the nation divided in two, commonly known as the Divided Kingdom. The Northern part was called Israel [Abraham grandson, formerly known as Jacob], hence the name Israelites and the Southern part was called “Judah” hence, Judaism. Judaism was their “religion” which was based on the laws of the Torah.
Abraham was a Hebrew / Jew. How did he know God and understand “organized religion” in the book of Jasher, it states Abraham was raised and taught by Noah for 39 years, from age 11 to 49 (Jasher 8:36, 9:6, 11:13). [The Book of Jasher, Josh 10;13; 2 Sam. 1:18].
According to the Jewish calendar and using the birth and death of his family members, Abraham was born around 2051 B.C. which would make Abraham and adult practicing organized religion {Hebrew or Judaism} before the actual existence of Hinduism, Islam [2000 B.C] or any other religious movement.
What was ayour first statement. 
