Erm... According to known history, Jesus' daddy was God Himself, so at least his dad was not a Jew. What about Mary? Well, she lived in Jewish territories and was therefore forced to abide by Jewish law, and that was enough to make her LEGALLY a "Jew". However, the people of the Galilee were immigrants from Canaan, displaced about 50 to 100 years before year zero. This makes it extremely unlikely that Mary is of Jewish descent. She most likely had no shred of Jew DNA in her.

Also, Jesus said to the Pharisees, which became today's "Jews", something like: "You are the sons of lies! You are vipers and hipocrites!" Which does not sound much like he has anything in common with them.

Also, Jews say Jesus was a Jew. So you can count on that being absolutely false.