It used to exist, before it was subjugated.
Again, same questions. Tell me about "Palestine". Tell me the name of any leaders it had before Arafat. What kind of government did it have? What currency did it use? Can you show me a political map displaying a country that was ever called "Palestine"? I wait with bated breath (not) the answers to these questions that have no answers, since the territory was always controlled by others. And no, Ancient Philistia doesn't count. They were a branch of the Sea Peoples, related to the Greeks and the Cretans. The "Falestini" are Arabs and Amalekites (a breed of Canaanite) that have NEVER been independent a day in their lives, since the Israelites took the Promised Land in the Hebrew Bible under Joshua so long ago. The Canaanites were there first, and were conquered by us. The Arabs arrived after 600 CE. Jews tend not to intermarry with others, but the other people in the Holy Land did and do. And the "Falestini" were always a part of an empire of some sort or other. And, to be fair, some Jews HAVE intermarried, albeit not to the degree of other groups.
And to forego our anti-Semitic friend, yes, Ashkenazi Jews have been proven to be related to other Jews, such as Sephardi Jews, and Yemeni Jews, and Kaifeng Jews, and Cochin Jews, and so-on, all of whom are related to Jews that remained in the Holy Land after the Romans conquered the region. The Khazars were not the origin site of the Ashkenaz. In fact, they were a Kingdom in Southern Russia and stretching into Northern Turkey. Only the Royals of that Kingdom converted to Judaism in any large numbers. Most of the common people were Christian or Muslim or Tengristic. the Royals became Jewish partly out of conviction, and partly for diplomatic reasons (they could be neutral in conflicts between their subjects if they held neither Islamic nor Christian nor Tengristic beliefs).
Back on our original point, in fact, the word "Palestine" itself comes from a Roman word, "Syria Palestina". The Arabic language has no letter "p", and no "p" sound. They have to write the word with an "f". In any case, I look forward to you giving me the answers to my questions. Especially since there are none. Before 1967, so-called "Palestine" was part of Egypt and Jordan, and before '48 the whole area was part of Syria, and the whole mess was ruled by Britain, and before that, it was all Ottoman, etc.
But the Jews have a history of an independent State there. Read your Bible for information on that. The Arabs never did, as they were always part of an Empire, and the Amalekites were dealt with in the Bible. I'll leave you to look that up for yourselves.
For information on Khazaria and the Khazars see:
http://en.wikipedia.org/wiki/Khazars