The Sacrifice

In the Old Testament God chose one nation for Himself.  That nation was Israel. Whenever the people of Israel sinned, God commanded a sacrifice be offered by the priest.  The sacrifice, often a lamb, was killed.  Its blood "covered over" the sin of the people.  This brought the people into a right standing before God.  Without the sacrificial shedding of blood, there was no forgiveness of sin. (Hebrews 9.22)  But with the sacrificial shedding of blood there was forgiveness ... at least for God's chosen people, Israel.  If the sacrifices described in the Old Testament foreshadow the ultimate sacrifice of  Jesus Christ (and they do), for whom does His blood atone?  For all?  Or only for His chosen people, those He has called to Himself.