Jacob is referring to the last verse of the allegory which speaks of the time when the Lord burns the vineyard. The events described are to occur after the Millenium. This is important because of the similarities between events which attend the Second Coming and those which occur during the little season when Satan is loosed after the Millenium. Both time periods have destruction by fire, both time periods have a battle of Armageddon, both time periods are characterized as bringing forth a new heaven and a new earth.
Jacob's record, though is clear; this burning of the vineyard will occur after the Millenium. This has reference to the sanctification of the earth in preparation for its celestial glory. It does not refer to the wicked being killed by fire. By this time, all the wicked have been resurrected already and there can be no more physical death. There can only be spiritual death—when those who are filthy still are cast out into their own place!