Tsvi Misinai validates his theory of the Hebrew origin of Palestinians on the basis of various findings in terms of historic-demographic, historic-geographic, national-territorial, genetic, behavioural-religious, nomenclature and linguistics, and Palestinian cultural and oral traditions.[13] In his book Brother shall not lift sword against brother, he details numerous testimonies of their Jewish ancestry by Palestinians and Bedouins, and cites the anthropological studies conducted by Israel Belkind, one of the organizers of the Bilu movement, David Ben-Gurion and Yitzhak Ben-Zvi (both the first Prime Minister and the second President of Israel, respectively).[2]