Christianity is the fulfillment of the promises and prophecies of Judaism. Jesus Christ is the Messiah of Judaism.
Read about an account of the crucifixion of Jesus that was written at least 2 centuries before he walked the earth. This is a part of the Jewish scriptures:
"But he was wounded for our transgressions;
he was crushed for our iniquities;
upon him was the chastisement that brought us peace,
and with his stripes we are healed."
Read the entire passage here