during that period I really think that there was not a very hight " haplogroup melting pot " 8000 years ago . No agenda to me just the truth ! but we will may be never know the " truth " anyway as I said during that time the Israel tribe had time to grow up with many other haplogroups convert as Shem tribes who followed the Hebrews in their migration and gradually integrated . The flood myth has its roots in the Black Sea catastrophe which caused a great dispersion of that peoples this disaster is in the Bible so the people who came to report that myth came logically from that region of the black sea - Caucasus not from the Arabian Peninsula . The black sea flood implied also the future Europeans dispersion from Anatolia to Western Europe during the neolithic . There is an other solution this Flood Myth came from Caucasus to Mesopotamia with the Sumerians tribes so later some Semitic tribes take it in their own believe and wrote the Bible ? In the same idea : Islam is just a copy of the Judeo Christian Monotheism, if you look at Islam this is really a mixture of the Old Testament not an original creation .
http://www.genomeweb.com/arrays/international-team-characterizes-jewish-genetic-patterns
"The researchers reported that the Ashkenazi, Caucasus, Middle Eastern, North African, and Sephardi Jewish populations clustered with non-Jewish populations in the Middle East, particularly
Druze and Cypriot groups, suggesting a " close relationship between most contemporary Jews and non-Jewish populations from Levant."
Other groups with a significant G frequency include Catalan-speaking northern Sardinians and the
Druze, who are about 18% G2a. About one-third of Haplogroup G in Iran is in sub-group G1.
http://my.opera.com/ancientmacedonia/blog/2010/01/22/y-chromosome-dna-haplogroup-g-and-macedonians
Haplogroup G occurs most frequently in the Caucasus region where half of North Ossetian males are in G, as are about 30% of Georgians and Azerbaijanis.
A large majority of European G2c’s are Ashkenazi Jews, but so far G2c has been tested in only a small number of people in the Middle East and South Asia. Among Ashkenazi Jews overall, about 10% are in haplogroup G