I had never heard of "Jews for Jesus" - very interesting!
I'm sorry, this has probably long been said - I only read the first page and then realised it was no use to try to read everything.
What struck me right on the first page was the creed that Voronwë posted and this quote:
I think the man is justified in his views. He knows he's not a regular Jew, and even though accepting Christ as the Messiah makes him a Christian in the theoretical sense of the word, I would say that there is a whole lot of historical baggage that comes with being a Christian!A lot of Christians automatically ask me, ‘When did you become a Christian?’ But I’m not a Christian. I’m a Jew and will always remain a Jew. I’ve become a Jewish follower of a Jewish Messiah. I’m a fulfilled Jew, a completed Jew. My Judaism has become far more complete. Love has been added. Jesus added love to Judaism. I am sure if you had asked Paul he would have said the same. Jesus helped fulfil his Judaism. He made it more complete. I don’t think Jesus talked about setting up a new religion.
For one, I'd say being Christian usually goes with belonging to some church - where would this guy go to assemble with others of like beliefs? Any church he could join would bring him a lot of ideas he probably wouldn't want to buy with the package.
The only other alternative is founding your own community and that's what he seems to have done.
Early followers of Christ saw themselves as just what this guy describes: Jews all around, who had accepted Jesus as their Messiah and decided to follow his teachings.
The early "Christians" did indeed not set out to become a new church and to seperate from the Jews. They kept the Jewish laws and had a hard time turning away from some restrictions their Jewishness laid on them, namely to bring themselves to communicate with non-Jews to share the news of the Messiah.
In respect of all this, I think it's quite possible to consider yourself a follower of Jesus and a Jew at the same time.