Theophylact of Ohrid

Therefore Pilate too, having understood the slander, openly says: "I find no fault in this man." In my opinion, even the very question which he puts to Christ is a mockery of the slander. For by saying: "Are You the King of the Jews?" he mocks the matter itself. He speaks as if to say: You, a destitute, poor, naked, helpless man, are accused of aspiring to royal power. …

Commentary on Luke ↗

Bede

But Pilate asked him, saying: Art thou the king of the Jews? And he answering said, Thou sayest it. By the same word, he replies to the governor, as he did to the chief priests, so that they might be condemned by their own judgment. And it is to be noted that of the two charges brought against the Lord, namely that he forbade giving tribute to Caesar and that he claimed to be Christ a king, Pilate thought it necessary to inquire only about the word concerning the kingdom. …

On the Gospel of Luke ↗

Bonaventure

Second, with respect to the right inquiry, is added: Pilate then questioned him, saying: Are you the king of the Jews? It should be noted that although Christ was accused of three things, Pilate inquired only about one, because he knew that the others were false. For since the holiness and goodness of Christ was apparent through his miracles and his reputation, and since through his own words it was evident that he did not forbid tribute to be rendered to Caesar, he doubted only about the third and inquired about it. …

Commentary on Luke, Chapter 23 ↗