Hebrews 9:24-28 (ESV)
[24]For Christ has entered, not into holy places made with hands, which are copies of the true things, but into heaven itself, now to appear in the presence of God on our behalf. [25] Nor was it to offer himself repeatedly, as the high priest enters the holy places every year with blood not his own, [26] for then he would have had to suffer repeatedly since the foundation of the world. But as it is, he has appeared once for all at the end of the ages to put away sin by the sacrifice of himself. [27] And just as it is appointed for man to die once, and after that comes judgment, [28] so Christ, having been offered once to bear the sins of many, will appear a second time, not to deal with sin but to save those who are eagerly waiting for him.
Jesus is not coming back to deal with sin which is what the animal sacrifices are about. Nowhere in the Bible are they described as a being a memorial to my Lord's once for all time sacrifice.
Hebrews 8:5-7 (ESV)
[5] They serve a copy and shadow of the heavenly things. For when Moses was about to erect the tent, he was instructed by God, saying, "See that you make everything according to the pattern that was shown you on the mountain." [6] But as it is, Christ has obtained a ministry that is as much more excellent than the old as the covenant he mediates is better, since it is enacted on better promises. [7] For if that first covenant had been faultless, there would have been no occasion to look for a second.
The animal sacrifices were part of the first covenant which has been replaced by the second covenant. To reinstitute animal sacrifices would be to return to "copy and shadow".
