Is there any core feature of christianity not found in other religions

[Angrboda]

The idea of purification through blood sacrifice is hardly new with Jesus, and the Jews had a long history of a tradition of scapegoating: that's where we get the term itself, from Jewish tradition.

In the Bible, the goat for Azazel was a goat that was designated ... to be outcast in the desert as part of the ceremonies of the Day of Atonement, that began during the Exodus with the original Tabernacle and continued through the times of the temples in Jerusalem.