This map is extremely misleading. The green areas shows very different things in each map.
1946: White is land privately owned by Jews. Green is mostly state owned land, so owned by the British empire, including the huge and mostly uninhabited Negev desert. Green contains land privately owned by local Palestinian Arabs, Druze, or foreign landlords in e.g. Damascus and Cairo.
1947 UN partition plan. White is the planned area for the Jewish state, including the empty Negev in the south. Green is the planned Arab state. Under this plan nobody would have had to leave their home. There would be remaining minorities in both. It was accepted by the Zionists, but rejected by the Arabs and Palestinians.
1949-1967: White is Israel. The green West Bank is annexed by Jordan. Green Gaza is occupied by Egypt. There is no Palestinian self rule. Arabs refuse to recognize Israel as a state. The green line of the ceasefire is explicitly not a border.
2000 Oslo accords: For the first time in history Palestinians have self rule in green areas A and B in Gaza and the West Bank. There are still to this day lots of Palestinians/Arabs with Israeli citizenship that live in Israel and own the same land they owned in 1946.
This map is extremely misleading. The green areas shows very different things in each map.