@Cosmoterios it appears you can show references to Palestine on multiple maps, you can cite quotes referring to Palestine from world leaders and journalists, or you can even mention the Balfour declaration's explicit reference to the people of Palestine. You can do all of that, and more, and it doesn't matter, at some point a jew will pop up saying that Palestine and the Palestinians don't exist.
Leaving aside the non-history of Jews in almost every nation they have fallen out with and, with that, discussing why do they then complain about the 109 times they have been moved on, it's quite obvious why there is a denial of Palestinian existence. Clearly it is to excuse the horror of the treatment these people have received. Essentially the Jewish angle is that "well, even if they ARE being treated badly, you know it doesn't really matter as the place (and the occupants of the place) never existed".
