God's loves us deeply and desires closeness with us even when we have sinned. Sin separates us from God and would forever without atonement. That's why God provided a way for the Isrealites to atone for their sins. An animal is hardly worthy and yet His love allowed it to be acceptable. We are fortunate to live in a time where Christ has atoned for our sins for us and all we have to do is confess our sin and ask for forgiveness.