Actually, if I understand your comment correctly, you are incorrect. Genetic analysis can disprove your statement. Genebase in Canada is excellent and Nat Geo’s genetic group does a good job.
My brother had his DNA done after I sent my family the results of mine (now confirmed by three other genetic companies) that showed Ashkenazi line by mtDNA (H24a1). My brother, in an effort to show we were NOT Jewish at any level, had his DNA done and he came up as J1c3(p58+). Unfortunately my other brother is still in denial. I am very sorry I have missed knowing and understanding the rich religious and cultural history of the Jews.
So, you see, it doesn’t matter where you are or how long your family has denied bying Jewish, if you look and do the DNA testing, you can confirm or deny your Jewishness.
Obviously, this is an entirely academic exercise that really has no bearing on the international legitimacy of modern Israel. But it seems to me that many (American) non-Jewish supporters of Israel try to build some sort of hyper-Biblical legitimacy for the modern state of Israel by appealing to God's promise to the Jews of the Old Testament, without bothering to understand what an Old Testament Jew is.
It also, to my mind, points to a strong hypocrisy in Israeli policy and the difficulty created when you try to maintain an ethno-religious national identity. Israel requires people to take a DNA test to prove their Jewishness before being allowed to make aliyah, when the truth is almost nobody in modern Israel, including the policy-makers, qualify as true Old Testament Jews.
A guy from eastern europe with supposedly a particle of the right genetics claims more right to be in Israel than Christians who have been living there for 2000 years.
Hey cousin! ;) I want to have mine done, but haven’t yet. However, we did do at doctor’s request the 23andme test of my little daughter from adopted embryo, and just got the results back last week. So awesome, it basically was a complete geographic history of the peoples who created Puerto Rico. What a story our genes tell.