Much of Volume 2 of Isaiah involves switchbacks within the text that alternate between two groups. Both groups belong to national biblical Israel. But God abundantly blesses only one of the two groups. One group obeys God; the other group disobeys. Eventually, Isaiah’s use of the names Sion and Jerusalem lands firmly upon the obedient. Again, it is important to realize that both groups ethnically belong to national biblical Israel. This explains why God no longer addresses “Israel” as a whole. The text has reached a point of final sifting. God addresses his obedient children as Sion and Jerusalem. The disobedient he addresses as transgressors (Septuagint Isaiah 66:3 and Isaiah 66:24). …