Theophylact of Ohrid

For the Jews, he says, the Crucified One is a stumbling block; for they stumble over Him, saying: how can He be God who ate and drank both with tax collectors and with sinners and was crucified with robbers? And the Greeks mock this mystery as foolishness, when they hear that only by faith alone, and not by the rational arguments to which they are so attached, can one understand that God was crucified and that the preaching of the cross is not adorned with eloquence.

Commentary on 1 Corinthians ↗

Irenaeus

For as it was not possible that the man who had once for all been conquered, and who had been destroyed through disobedience, could reform himself, and obtain the prize of victory; and as it was also impossible that he could attain to salvation who had fallen under the power of sin,-the Son effected both these things, being the Word of God, descending from the Father, becoming incarnate, stooping low, even to death, and consummating the arranged plan of our salvation, upon whom [Paul], exhorting us unhesitatingly to believe, again …

Against Heresies (Book III, Chapter 18) ↗

Thomas Aquinas

Then he concludes why the word of the cross is foolishness to them, saying: But we preach Christ crucified, as below (11:26): "You proclaim the Lord's death until he comes," to Jews a stumbling block, because they desired strength working miracles and saw weakness suffering; and to the Gentiles foolishness, because it seemed against the nature of human reason that God should die and that a just and wise man should voluntarily expose himself to a very shameful death.

Commentary on 1 Corinthians ↗