Rather presumptuous to claim to know better than the Jews who their Messiah should be.
There are two groups of prophecies concerning the Messiah.
1 - Redeemer
2 - King
That is, the Messiah would come to be the "lamb slain from the
foundation of the world" to redeem us from sin.
The second is the King who reigns over the earth.
Zechariah, for one, shows how this Jewish King would be the
one who's hands and feet were pierced, and who was the
lowly one who rode upon a donkey.
The Old Testament is clear - the Jewish people would reject
their Redeemer. As a result they would be exiled and the
Gentiles instead would trust in Him. Jesus said that when
the Gentiles no longer believe the Jews would return from
exile and take back their country "with the sword." And then
the Jews and all the world would mourn the coming of the
King - that's what the bible says anyhow.