you have people from all over the world. unless their ancestor lived in caved up to nowadays, they have mixed with the local populations of wherever they were. how can a north african berber or arab berber jew can be ethnically (not to mention culturally) similar to someone from poland or russia? this is absolute rubbish. the term used is inadequate. you are building a nation based on certain values around which everyone can identify to but it does not make an ethnical group. it makes a national identity. there's a clear distinction.
At least 1,000 Israeli Arabs protest death of Palestinian infant in deadly West Bank arson (Haaretz)
from the article: Israeli population stands at 7,695,000 at end of 2010