By that logic where is the Christian homeland? Jesus was born in Bethlehem, does that give all Christians a right to displace the people who live there?

Similarly the Irish are famous for being ethnically a Celtic people. The Celts originated in Hallstatt, Austria, so does that entitle any Breton, Cornish, Irish, Manx, Scot or Welsh person to turn up and settle on the shores of the Hallstätter See?

All humans trace their origins back to Mesopotamia, can we all claim some land in Iraq too?