Well, as far as animal sacrifices, remember, Hebrews started off as nomadic, pastoral people. Animals were what they had available to sacrifice. It was not that different from regular slaughter for food.
I once did Torah studies with a group of women at my synagogue. (A fun experience at a liberal Reform congregation, where half the participants would say "I'm not sure there IS a god"

) Anyway, the topic was the construction of the Mishkan (The Tabernacle? That Ark in Indiana Jones movie.) The topic was the very detailed description of who gave what to build it. And the question was, "What should we bring to the God's indwelling?"
Inevitably, someone began, "Our hearts, our minds..." But to me, it seemed clear that it had to be a thing. Something we made, something we valued, produced by skill and craft, or at least treasured. Not what we feel but what we do, and what we are prepared to give up for the common cause.
Well, it's that deed over creed thing.

To be righteous, you need to be good at something, and then you need to share whatever that produces.
This has absolutely nothing to do with Jesus and resurrection. Human sacrifice is something else, and self-sacrifice is something else again.
"Aargragaah. It mean lit’rally der time when you see dem little pebbles and you jus’ know dere’s gonna be a great big landslide on toppa you and it already too late to run. Dat moment, dat’s aagragaah.”
Terry Pratchett, Jingo