God expostulates here with the Israelites for their ingratitude. He records the benefits he had before conferred on that people; and then shows how unworthily and disgracefully they had conducted themselves; for they forgot their many blessings and proudly despised God, and acted as if they were like other nations, and not bound to God for the singular benefit of adoption. The sum then is that God here complains that he had ill bestowed his blessings; and he reproves the people for their impiety, inasmuch as they did not lead a holier life after having been freely redeemed.
He says first, I have exterminated the Amorite before their face. God shows here that he was disgracefully defrauded by the Israelites, for whose sake he had previously destroyed the Amorites. For why were the Amorites exterminated, but that God would cleanse the land, and also, that he might give there a dwelling to his own people, that he might be purely worshipped? Then the people of Israel ought to have given up themselves wholly to the service of God; but as they neglected to do this, they frustrated the purpose of God, who had expelled the Amorites from that land, yea, and entirely destroyed them. The first complaint then is, that the children of Israel were nothing better than the Amorites, though God had given them the land, which was taken from its natives, that they might dwell in it, and on the condition, that his name should be there worshipped. Hence the Prophets say elsewhere, that they were Amorites. They ought to have been a new people; but as they followed the examples of others, in what did they differ from them? They are therefore called their posterity. But the Prophet speaks not here so severely; he only reproves the Israelites, because they differed in nothing from the Amorites, whom they knew to have been destroyed that they might be introduced into their place, and succeed to their inheritance.
It is then added, that the Amorites were tall in stature, and also that they were strong men. By these words the Prophet intimates that the Amorites were not conquered by the people’s valor, but by the wonderful power of God. We indeed know that they were dreaded by the people of Israel, for they were like giants. Then the Prophet speaks here of their height and strength, that the Israelites might consider that they overcame them not by their own valor, but that the land was given them by a miracle, for they had to do with giants, on whom they could hardly dare to look. It was then God who prostrated the cedars and the oaks before his people. We hence learn, that the Israelites could not boast of their own strengths as though they took possession of the land, because by means of war they ejected their enemies; for this was done by the singular kindness of God. They could not indeed have contended with their enemies, had not that been fulfilled which the Lord had so often foretold, ‘For you, while still, I will fight,’ (Exodus 14:14) We now perceive the Prophet’s intention. But we may hence farther learn, that the Israelites had not possessed the land, because they were more excellent than the Amorites, its ancient inhabitants; but because it so pleased God. There was therefore no reason for the people of Israel to be proud on account of any excellency. It hence appears that they, who did not consider this remarkable kindness done to them, were more than doubly ungrateful to God.
He says that their fruit above and root below were destroyed. By this metaphor God enlarges on what he said before, that the Amorites had been exterminated, so that none of them remained. “I have demolished,” he says, or, “I have entirely destroyed the root beneath and the fruit above; I have extinguished the very name of the nation.” And yet the Israelites were not better, though the Amorites were thus destroyed; but having succeeded in their place, they became like them: this was utterly inexcusable. The more severe God’s vengeance had been towards the Amorites, the more ought the Israelites to have extolled his favor: but when with closed eyes they passed by so remarkable a testimony of God’s paternal love, it appears that they were extremely wicked and ungrateful.