also some recent work on matriarchal line on europeans showed something like 7 matriarichal groups were origin of basicly all of europe.....similar work could show common genetic tags with higher incidence in groups suspected of having jewish origin.
of course, i guess not much of this is gonna get proven anytime soon....
I agree with your statement above. I can think of reasons why no Moslem would want to claim genetic ties with Israel, I can think of propaganda reasons for both doing it and not doing it, and I can think of religious reasons why those related to Israel but who had converted to Islam would want to stand and proudly proclaim that they had done the right thing.
And like you mention, the war going on isn't gonna 'cause anyone to rush to the DNA clinic anytime soon.