I'm not sure I follow what you are saying. Maybe you're thinking of a different Jesus? I assumed we were talking about Jesus of Nazereth, who was a Jew born in Judea, according to the best historical information available.
Do you mean that there is a minority of historians who contend that there never was such a person? Of course that's true. In any case, he certainly could not have been a Palestinian. That would be like calling Catherine the Great a Soviet. It makes zero historical sense.