.
>> “Was the sacrifice for sins finished or not?” <<
.
Of course it is finished, but that was just the first feast, when he said it. There remained Unleavened Bread, and Pentecost before he was to move in next to his daddy.
Remaining at this time are Purim, Yom Teruah, Yom Kippur, Succot, and The Last Great day before Torah has performed its intended service.
That means that it will be at least another 1000 years before the first jot or tittle of Torah falls off the scroll.
.
Where are coming up with any of that? In particular where are you coming up with another 1,000 years?