God has clearly told them and us, that He alone is their Savior. We do not believe "that someone else" suffered and died for us. We believe in John 3:16.
They had and have, a Holy Day known as the Day of Atonement. All their sins were placed on a goat who then was either thrown off a cliff or let loose in the wilderness. He was the sacrificial goat. Other times of the year, individuals and families paid to have animals slain in the temple to atone for their sins. It was blood atonement, a blueprint that God so graciously gave them pre-heralding the real thing, that He would do Himself.
Jews do not read John. You should learn about Judaism and what it believes. You will find that their idea of the messiah and ours is like night and day and that they do not believe a man needs to be saved but rather than man needs to make himself righteous in the eyes of God by good works.