Mark, and Paul, have a doctrine of atonement. Jesus’ death is a death “for the sake of others.” He dies in the place of others. His death is a sacrifice that pays the debt that is owed by others.

In the Acts of the Apostles, Luke does not have a doctrine of atonement. For him, Jesus’ death makes you realize how you have sinned against God and you turn to God and beg his forgiveness, and he forgives you. No one pays your debt; God simply forgives it.

Steefen:

This is all Post-Temple destruction religion, not of the historical Jesus and not of the historical apostles who supposedly lived while the Temple was still a vibrant place of worship. This is all a test of historicity which the New Testament fails.

It is a corruption of the Torah. If Mark and Luke were presented to Jews, it would lead them astray from Yom Kippur, Leviticus 16: 29. In the New Testament, John the Baptist and Jesus are not shown honoring the holiest day in Judaism. Paul, "Mark," and "Luke" make an assault on the Torah. How deficient the picture of Judaism is in the New Testament to black out and silence Yom Kippur but make a new religion of atonement, repentance (confession), and salvation.

There was no vacuum to fill in reference to forgiveness and repentance.

Yom Kippur (/jɔːm ˈkɪpər, joʊm, jɒm/;[1] Hebrew: יוֹם כִּפּוּר, IPA: [ˈjom kiˈpuʁ], or יום הכיפורים), also known as Day of Atonement, is the holiest day of the year in Judaism.[2] Its central themes are atonement and repentance. Jewish people traditionally observe this holy day with an approximate 25-hour period of fasting and intensive prayer, often spending most of the day in synagogue services.

Yom Kippur is "the tenth day of [the] seventh month"[3] (Tishrei) and is regarded as the "Sabbath of Sabbaths". Rosh Hashanah (referred to in the Torah as Yom Teruah) is the first day of that month according to the Hebrew calendar. On this day forgiveness of sins is also asked of God.

Leviticus 16:29 mandates establishment of this holy day on the 10th day of the 7th month as the day of atonement for sins. It calls it the Sabbath of Sabbaths and a day upon which one must afflict one's soul.

Leviticus 23:27 decrees that Yom Kippur is a strict day of rest.