You have to be able to provide evidence for what you are claiming. Look at the link below which was posted by PBS and it shows the DNA results for Alan Dershowitz, Bill Maher and Tony Kushner and all of them have DNA results tracing to Europe at 99% and to the Middle East at 0% and that was why the Middle East was left blank but Eastern Europe was highlighted to show where their ancestors came from. DNA is 100% accurate and therefore there is no way that you can dispute it.
tinyurl.Com/Dershowitz-Kushner-Maher-DNA