1) a logical difficulty exists here for annihilationists and eternal tormentists--because all goods proceed from truth, and God is pure, perfect Truth. For Him to destroy or eternally separate literally any good from His creation is a logical impossibility. Corresponding to this, of course, is the fact that all His pronouncement of wrath and destruction in the Bible is only ever toward evil, never good.
2) Abraham elaborated the truth that to destroy good would violate the fundamental perfection of God when he said, "Far be it from Thee to do such a thing, to slay the righteous with the wicked, so that the righteous and the wicked are treated alike. Far be it from Thee! Shall not the Judge of all the earth deal justly?"
In the story of the Exodus, the nation Israel is a metaphor for the individual who is brought to the gates of promise, fails for lack of faith and is turned back into the wilderness until sufficient unbelieving parts are destroyed such that Israel is brought back to the land of promise with faith created from hardship.