Jesus lived, taught, and died as a Jew. He defined himself and his Jewishness in much the same way as today's Torah-observant Jews. He conducted himself as a devout rabbi and Pharisee. He wore a Jewish head covering, prayed in the Hebrew language, ate only kosher food, honored the Sabbath, had the mezuzah parchment on the doorposts of his home, lit a Chanukah menorah, wore the tzitzit-fringes, donned telfillin daily, wave an esrog and lulav on Sukkot, ate matzo on Passover, and studied the Torah regularly. He enjoyed the selfsame relationship with God shared by all Jews.
"Kosher Jesus," Shmuley Boteach pg. x (introduction)
How Jewish was Jesus?