A Loyalist from Northern Ireland becomes Jewish, he plans to move to Israel and settle and start a new life. He exclaims that Palestine was a "political invention" and tells Palestinians who have lived there their whole life "you have had a nice holiday, time to go home". This is an extremely valid argument as this man has never set foot on the Land of Israel or Palestine. This Snippet was taken from the BBC documentary called Shalom Belfast.
We are not dealing here with Jewish race or gene. Taking on the Jewish religion in this case introduces a set of supremacist non ethical beliefs. This is what Jewishness is all about.