It’s quite simple.
“But we know that the law is good if one uses it lawfully,” (1 Tim. 1:8)
The OT law had it place prior to the coming of Christ. It was lawful to offer animal sacrifices in the manner stipulated by God.
Once Christ came and made the final, once for all time sacrifice for sin, that OT command no longer had any lawful use. That is the plain testimony of Hebrews, Galatians, etc in the NT.
So to suggest that in the future, after the coming of Christ to atone for the sins of His people, that such OT sacrifices would again be made, is repugnant and an affront to the Lord Jesus Christ.
Dispensational confusion comes about by failing to see the distinction between the OT sacrifices and the new covenant sacraments of baptism and the Lord’s Supper, which were specifically given by our Lord to the Church to be done often until He comes again.
The law is holy.
There is nothing in the bible that I can find that says the old sacrificial system became “repugnant” after Calvary. In fact, Acts 21 shows both Paul and the Apostles deeply involved as Jewish Christians in the Temple ritual.
I don’t know where you come up with “repugnant.” Even with the 1 Tim 1:8 verse, there is a clear affirmation that the law is good. And there is no scripture that says that the sacrificial system is “repugnant.” It does say: (1) that the sacrifices weren’t what really was effectual in atonement; and (2) they are not required of Gentiles (Acts 15).