You are the one claiming animal sacrifices will be introduced in the future yet seem incapable of actually explaining why and what they achieve.
This would be a logical fallacy. Sacrifices are named in Scripture after Jesus returns to the earth. Whether or not anyone on earth understand why God would do this is beside the point. The point is, the Bible says this will be so, though I know you reject the idea. Nonetheless, it's what the Bible says. Zechariah 14 is one place.
Will you acknowledge that someone does not need to explain why God would or would not do something, or have us do something, for that something to be valid?
That no one has to expain why there would be animal sacrifices offered in the kingdom, as some requirement of showing Biblically that these sacrifices will in fact be offered? Can you acknowedge that? I'm not trying trap you in a corner, I'm trying to free you from an invalid argument.
Much love!