After wwII, there was a UN resolution to divide Israel into a Jewish State and an Arab State. Jewish leaders accepted it Arab leaders rejected it. When Israel declared independence in 1948, Arabs invaded starting the 1948 Arab-Israli war. Palestinians lost in what they called a 'Nakba' (catastrophe) which could have been avoided if they accepted the UN resolution.
Arabs (Palestinians) could have avoided all this if they agreed to separate States. Now, they say anyone who supports Jews is somehow a 'Zionist' which is rooted in decades old lies.