Anti moral-naturalist: all they’re doing is Outweighing one set of naturally-evolved and expanded upon naturalistic evolutionary-intuition against another.
Basically they are just applying reason to an evolved moral-intuition.
For example: dying and suffering are bad. It’s therefore reasonable that an action that causes more deaths but is indirect action is worse than another action which causes less or no deaths.
Consequentialism combines moral intuition with reason. You can invent reasons which also are reasonable for why suffering is bad, but it starts off from that intuited assumption.