The word "Kosher" implies legitimacy, legality and validity - all from the standpoint of Judaism and the Jewish people.
The only way it could be said that Jesus is Kosher is by ignoring the Jewish Bible and over 2000 years of Jewish history.
Christians claim that Jesus was a prophet, that he was the Messiah and that he was the second person of a triune god.
According to the Jewish Bible, he was none of the above.
The Jewish Bible defines a prophet as someone who encourages devotion to the G-d who spoke to the Jewish people at Sinai (Deuteronomy 13:2-6). The Christian assertion that Jesus advocated devotion to himslef as a deity negates the claim that he was a true prophet.
The Jewish Bible defines the Messiah as someone who shepherds Israel with peace and security; Jesus didn’t fulfill this calling (Ezekiel 34:23-25, Isaiah 11:1-10).
The Jewish Bible defines G-d as the Creator of heaven and earth, not as one of earth’s inhabitants (Jeremiah 10:11).
According to the definitions of the Jewish Bible, Jesus is decidedly NOT kosher.
The Jewish people were chosen by G-d to be His witnesses (Isaiah 43:10). For over 2000 years these people have testified that faith in Jesus represents the very antithesis of their calling before G-d. The Jews have remained true to this testimony in the dark streets of Europe’s ghettos. They remained true to this testimony on the torture racks of the Inquisition. They remained true to this testimony in the face of the Crusader’s sword. And they remained true to this testimony in the gas chambers of Nazi Germany. For over 2000 years the Jewish people have testified: "Jesus is NOT kosher".
The claim that Jesus is Kosher ignores the teachings of the Jewish Bible and sweeps away the testimony that the Jewish people have given on this issue for the past 2000 years.
If you would like to know more about what the Jewish Bible says about the Messiah, and why Jesus doesn't fit, please read the following pages, or follow some of the links that are provided. As to the question: "Is Jesus Kosher?" - the Jewish Bible and the Jewish people have already answered the question. The answer they have provided is direct, decisive and unequivocal.