What is the diffrence between a Jew and a Gentile?
Romans 3:29
29 Is he the God of the Jews only? is he not also of the
Gentiles? Yes, of the Gentiles also:
Romans 9:24
24 Even us, whom he hath called, not of the Jews only, but
also of the Gentiles?
25 As he saith also in Osee, I will call them my people, which
were not my people; and her beloved, which was not beloved.
26 And it shall come to pass, that in the place where it was
said unto them, Ye are not my people; there shall they be
called the children of the living God.
1 Corinthians 10:32
32 Give none offence, neither to the Jews, nor to the
Gentiles, nor to the church of God:
1 Corinthians 12:13
13 For by one Spirit are we all baptized into one body, whether
we be Jews or Gentiles, whether we be bond or free; and have been
all made to drink into one Spirit.
14 For the body is not one member, but many.
15 If the foot shall say, Because I am not the hand, I am not
of the body; is it therefore not of the body?
However!!! In the reference below from the prophacy book of Revelation, it is CLEAR that if you are not Jewish, you should by no means claim to be a Jew.
Revelation 3:9
9 Behold, I will make them of the synagogue of Satan, which say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee.