The identical actions of the Lord and the Angel of the Lord show they are the same Being. The God known by Abraham, Isaac, Jacob, and Moses was Jesus Christ.
Christ's comment in Matthew 22:32 about "the God ... of the living" gives absolutely no mention about a place of the afterlife, but only a condition.
High Christology as a doctrinal stance was not enough to prevent the eventual apostasy of those in Asia Minor. Doctrine must produce the right conduct.