In the letter to the Church at Ephesus,the very first letter to the seven Churches,the people are praised because they drove out those "who said they were apostles but they were not;they lied". Same thing as "those who say they are Jews,but are not:they lie". The caution is to liars,twas then at it is now. Trying to define who was who is not at all the point and one loses sight of Truth when silly word games are pleased. The point is that wolves in sheep's' clothing are dangers,then as now.
Correction----twas then as it is now.
"one loses sight of Truth when silly word games are PLAYED",not "pleased.Sorry.
en tw kairw ekeinw epestreyen raasswn basileus surias thn ailaq th suria kai exebalen tous ioudaious ex ailaq kai idoumaioi hlqon eis ailaq kai katwkhsan ekei ews ths hmeras tauths.
This is the Septuagint version of [II Kings 16:6]. This is the first time the word Jew is used in scripture. (200 B.C.)
οπου ουκ ενι ελλην και ιουδαιος περιτομη και ακροβυστια βαρβαρος σκυθης δουλος ελευθερος αλλα τα παντα και εν πασιν χριστοs
The above is [Colossians 3:11] Where there is neither Greek nor Jew, circumcision nor uncircumcision, Barbarian, Scythian, bond nor free: but Christ is all, and in all.
As you can see the Greek word for "Jew" was the same in the Septuagint as it is in Colossians....in the New Testament.
Belonging to Jehuda or of the tribe of Judah....Strong's # 2453.