What makes 1945 important is that while the rest of the world was moving toward political independence for those nations colonized as part of a most horrible and regrettable European colonialist capitalist history, one small area moved in exactly the opposite direction. Actually, Kenya was colonized formally after 1900, and one could cite South African formal apartheid era as after that time as well (though how different formal apartheid was from what was going on in South Africa prior could be debated). But Kenya achieved political independence in the early 1960s and the apartheid regime fell in 1990. But at least we are in agreement that Israel, like Rhodesia, South Africa, Kenya, and as you cite, the U.S., Canada, Asutralia, New Zealand, etc., is a settler colonialist state.