Well, that just means they would "not quite like Jews", because he defined it that way. No other definition, yours or anyone elses is applicable.
WHERE'S THE BEEF?
The beef is that Lost Tribe doesn't know what he is talking about. The Jewish religion does not make any distinction between the various tribes of Israel. The fact that the Jews are the only tribe known today does not mean that another Hebrew tribe, if one were ever found, would be gentile. It most certainly would not.
The other tribes would not be gentile from a Jewish perspective because the Jews would not consider them gentile. How many ways can that be said?
I object when uninformed people like Lost Tribe make cavalier statements about my religion based on no knowledge.
Strong's definition makes no sense (Strongs Concordance)
Lost Tribe doesn't know what he is talking about.
Placing the designation of "Jew" ... after the Babylonian captivity ... is completely arbritrary
You're the kind of guy who has to play marbles alone because you change the rules in the middle of the game to suit where your marbles lay. Bet you even have trouble with the definition of IS.
Forgettaboutit!
There are those "experts" who cannot be bothered to learn the Jewish perspective about anything. The ideas "Lost Tribe" is expressing are from the 19th century movement called "British Israelism" -- basically, the belief that the Celtic and Anglo-Saxon peoples are the Lost Tribes of Israel. Evidently, they believed that God is a practical joker -- why else would He have all these Jews go to the Synagogue, study Hebrew, etc. for thousands of years while all along the "real" Israelites were revelling in their Aryan purity in Scotland, England, Germany, etc.
The modern offshoot of British Israelism is the so-called Christian Identity movement, by the way. While the followers British Israelism were content to believe that the British Empire was the Kingdom of God on earth, the members of the Christian Identity movememt seem to have a fetish for the Third Reich. Their idea of heaven seems more like hell to me. Do a search for "Christian Identity" and you will quickly find some very unsavory things.