Perhaps the most powerful objection against Israel’s demand on others to recognise its “right to exist” are claims it had made about itself during the country’s founding. Israel’s declaration of independence was based on the Balfour Declaration, the Mandate of the League of Nations and the General Assembly’s Partition Resolution. Every one of those claims have been challenged on legal grounds since 1948. The Balfour Declaration of 1917 for example did not recognise the right of the Jewish people to a state in Palestine. It simply stated that the British government viewed “with favour the establishment in Palestine of a home for the Jewish people” but that this was to be without prejudice to the “civil and religious rights of existing non-Jewish communities in Palestine.” The clear and obvious goal of the declaration was to create a “home” for the Jewish people “In Palestine“, not erase Palestine as Israel has done to supplant a new state on top of it.
Source: No, Discussing Israel’s ‘Right to Exist’ is not Antisemitic; States don’t have Rights, People Do