Rhetorical: Amulek is here assuming that whatever else this people might believe, they do continue to have some respect for the law of Moses. This was also implicit in the citation of scripture to them. Had they been completely apostate, the scriptures would have had no authority with them. What Amulek is now doing is equating the concept of Mosaic sacrifice with the infinite sacrifice of the Atoning Messiah. The symbolism of the animal sacrifices was given to prepare them for the concept of an infinite sacrifice for sin.