tankerbell you are trying to relate koreans to the jurchens & manchu but the fact its the korean historians politically tried to make people to believe manchu/jurchen dynasty in china are related to koreans. Yes they may all originated from the same mountain but they are essentially not the same, the customs & traditions are so different. Besides Haplogroup O2b is also found in south east asians like thai indonesian & vietnamese where it has the highest frequency which suggest O2b originate from south east asia, not manchurian origin