There is no purpose in doing some hypothetical scenario. Israel's existence is dependent on settler colonialism. it is dependent on the displacement of Palestine in one way or another. Settler colonialism is an act of violence no ifs ands or butts.
There is no point in debating a hypothetical world where Israel exists without colonialism, because that's not the world we live in and it never will be. This is a Zionist talking point that people like MrKaplan use to justify support for Israel, and that you are unwittingly falling for and defending.