Ritualistically: by blood sacrifices in the Temple on the Day of Atonement.
Actually: by Faith in the word of YWHW.
Moses was not a Christian, he lived before the time of Christ. Moses was a Jew.
A Jew seeks forgiveness for his sins from the one against whom he sinned. No human being can forgive sins against god, and god doesn't forgive sins against other people. The Jew has to discuss it directly with the appropriate victim of his sin.
Christ was a Jew.
Jesus existed before there were denominations, or even Christianity. Jesus was a Jew.
Christ was a Jew. Judea refers to a region of what is now Israel.
Mary was a Jew and worshipped the God of the Jews, the biblical God.
An apostate.
A Jew seeks forgiveness for his sins from the one against whom he sinned. No human being can forgive sins against god, and god doesn't forgive sins against other people. The Jew has to discuss the matter directly with the appropriate victim of his sin, whoever it happens to be.
Jesus Christ
Jesus Christ's nationality is Jew. Strictly speaking, he lived in the Roman Empire, which would have made his nationality a Roman citizen. He was ethnically and religiously Jewish.
Cartaphilus aka the Wandering Jew.
The concepts of 'Christ' and 'Anti-Christ' do not exist in Judaism, they're strictly Christian concepts.