Acts 7:25

"And seeing one of them suffer wrong, he defended him, and avenged him that was oppressed, and smote the Egyptian: for he supposed his brethren would have understood how that God by his hand would deliver them: but they understood not." See how up to this point he is not yet offensive to them; how they listened to him while he said all this. And "his face," we read, "was as the face of an angel." "For he supposed," etc. And yet it was by deeds that his championship was shown; what intelligence was there need of here? but still for all this "they understood not." For what though they killed him not actually? In intention they did kill, as did the others in the former case. There, they sold out of their own into a strange land: here, they drive from one strange land into another strange land: in the former case, one in the act of bringing them food; in this, one in the act of giving them good counsel; one to whom, under God, the man was indebted for his life! Mark how it shows the truth of that saying of Gamaliel's, "If it be of God, ye cannot overthrow it." See the plotted-against eventually becoming the authors of salvation to those plotting against them: the people, plotting against itself, and itself plotted against by others; and for all this, saved! A famine, and it did not consume them: nor was this all: but they were saved by means of the very person, whom they had expected to be destroyed by their means. A royal edict, and it did not consume them: nay then most did their number increase, when he was dead "who knew" them. Their own Saviour they wished to kill, but for all that, they had not power to do it. Do you observe, that by the means whereby the devil tried to bring to naught the promise of God, by those very means it was advanced?

He declares, then, that this ingratitude arose from here, and against the benefactors [εὐεργέτας] it was treacherous among the Jews. For Moses, who in anger once struck down the wrongdoer, his fellow-countryman, is now treated with leniency toward the wrongdoer. But he who used his …

Moses supposed that his brethren understood that God was granting them deliverance through him. Moreover, God's protection was evident from the very deeds themselves — what further understanding was needed? Yet even so, they did not understand.

For he supposed his brethren would have understood him,....

He applies this to those that prosecuted him, and sat in judgment upon him, sharply reproving them for their wickedness, by which they had brought upon themselves the ruin of their place and nation, and then could not bear to hear of it,