How does God fulfill Yom Kippur

From jewfaq.org

Yom Kippur is probably the most important holiday of the Jewish year. Many Jews who do not observe any other Jewish custom will refrain from work, fast and/or attend synagogue services on this day. Yom Kippur occurs on the 10th day of Tishri. The holiday is instituted at Leviticus 23:26 et seq.

The name "Yom Kippur" means "Day of Atonement," and that pretty much explains what the holiday is. It is a day set aside to "afflict the soul," to atone for the sins of the past year…This day is, essentially, your last appeal, your last chance to change the judgment, to demonstrate your repentance and make amends...end

We often consider the fulfillment of the Jewish feasts in the end times as part of God’s timing. We read things like, “Jesus will fulfill the remaining feasts, the Fall Feasts, when He returns.” Praise God for those who seek understanding. This is no criticism of their study. That said, how could God fulfill this feast?

Day of Atonement is a day of repentance for sins against God. How and why would God be able to “fulfill” this?

In my thinking, this day is fulfilled when people recognize Christ Jesus as Messiah and repent for not recognizing Him before. This must occur before the people can be acceptable to God's kingdom.

A short summary of the Fall Feasts:

Rosh Hashana-the most scripturally accurate name for this day is in Leviticus 23:24, “a day of memorial and loud noise”, Yom Teruah proclaimed with the blast of silver trumpets and a Holy convocation. See Numbers 10: 1 and 10:5. Later, the shofar may have been used. The Hebrew word for trumpet is taken from a root word meaning to reverberate. Easy to see why this is popular as a rapture day. What is being remembered?

Yom Kippur-Day of Atonement, as discussed. Is this the true “day of remembrance”? From Wikipedia:

…strongest theme is the "coronation" of God as King of the universe in preparation for the acceptance of judgments that will follow on that day, symbolized as "written" into a Divine book of judgments, that then hang in the balance for ten days waiting for all to repent, then they will be "sealed" on Yom Kippur. The assumption is that everyone was sealed for life and therefore the next festival is Sukkot (Tabernacles) that is referred to as "the time of our joy" (z'man simchateinu).

Also, from Lev 25:9 the shofar is to be blown on this day to announce the coming Jubilee six months later.

Is the ten day period between Rosh Hashana and Yom Kippur the ten days from the letter to the church of Sardis?

Sukkot-Feast of Booths is known a “the time of our joy”. This is a time to remember the 40 years of wandering in the desert. They watch the sky through openings in the roof at night to admire the works of God.

In all cases of the Fall Feasts the people are fulfilling them by responding to God, God is not directly acting. It is the people who must remember.

Perhaps the idea that Jesus/Messiah acts to fulfill all of the Fall Feasts should be reconsidered.