Jews have a common ancestry and it can be traced using current genetic technology. I'm of course not surprised because of what the Bible says. Dr. Mariottini asked a very good question in his post: Why don't people just believe the Bible. I think it is because it's fear. If The Buible is right about that, then it could be right about the fact that we are all sinners deserving hell and the only way to get out of that is through Jesus Christ. It is most easier to believe a lie.
Dr. Claude Mariottini - Professor of Old Testament: Abraham’s Children and the Genome Project