I am sure that Einstein would have been our supporter!
Have a look to this interesting essay:
ALBERT EINSTEIN: SECULAR HUMANISTIC JEW
Here is a quote, emphasis is mine.
"Einstein’s Zionism would be barely recognizable today, because it did not include support for a Jewish state. He favored the creation of a “national home” that would welcome Jewish immigrants and foster Jewish cultural development within the framework of a bi-national state guaranteeing equal rights to Arabs. His model may have been Switzerland, which is divided into regions (“cantons”) where various nationalities enjoy autonomy. In 1938, for example, he asserted that he would “much rather see reasonable agreement with the Arabs on the basis of living together in peace than the creation of a Jewish state,”2 claiming that statehood was inimical to the “essential nature of Judaism.”
Einstein continued to oppose a Jewish state after World War Two. In testifying before an Anglo-American Committee on the future of Palestine in 1946, he called for an international trusteeship, free immigration of Jewish refugees and eventual independence under conditions of Arab-Jewish equality. However, by 1947, he accepted the necessity of partition and like nearly all Jews and progressive forces in the world, Einstein greeted the establishment of Israel in 1948. After Weizmann’s death in 1952, Einstein declined an offer to run for election for the honorary position of President of Israel.
He remained a supporter of Israel for the rest of his life, but continued to express misgivings about its failure to reach a settlement with its Arab neighbors and cautioned it against over-reliance on military force. At a time when no attention at all was paid to the plight of Arab citizens in Israel, who remained under military rule until 1966, Einstein warned “The attitude we adopt toward the Arab minority will provide the real test of our moral standards as a people.” "