Utterly breathtaking amount of historical confusion.

After WW1 the British, who were the major imperial colonial power at the time, though on a steep decline, had already decided that the strip of land we now know as Israel/Palestine was a strategic necessity in order to ensure a divided and weak middle eastern political arrangement, which could be exploited by mineral and oil investors. The old colonial system was clearly on the way out, and needed to be replaced by a system of international finance neocolonialism that came to prominence after WW2 with the Marshall Plan.

So they knew they couldn't just colonize Palestine, it was against their interests as the seat of international finance capital. This was outlined in broad strokes in the Balfour Declaration written by James Balfour sent to Lord Lionel Rothschild, later adopted with the League of Nations Mandate in 1921. So they backed the Zionist project and started encouraging Zionists to move to Palestine which had an existing Jewish population and whose government was generally tolerant of these Zionists who brought with them lots of foreign capital to invest. This plan continued until WW2 when the industrial economies of Europe, and especially Britain were utterly destroyed by the war. The USA, which had stayed out of the war as much as possible until the battle of Stalingrad that turned the tides against the Nazis, had wanted this since it could then establish itself as the world's industrial powerhouse and seat of neocolonial finance capital. After a period of mass industrialization, this is exactly what happened.

But of course the international finance capitalists, wherever they were stationed, had a plan in place for the region of Palestine; and a few years later, with backing of the international community, we have the tragedy of the Nakba.

100 years of conflict, engineered by the international ruling class of our current world. Obviously regional tensions existed, Muslim and Jewish tradition goes back a very long time and has occupied the same parts of the world for much of it, but the period of peace that existed in the region of Palestine was 500 years long before the British carved up the Ottoman empire for their own benefit.