Theophylact of Bulgaria
“A man who is a Roman, and uncondemned...” Paul did not lie when he said that he was a Roman. His father, for the sake of representation, had bought this name for himself with money, because those counted worthy to be called by it enjoyed great honor.
Paul says this so that, if he were punished, they would not begin to treat him with contempt. If they had punished him, they would have given the matter another turn and would have killed him.
But now, though for no other reason than this very fact, that he was a Roman, they not only did not punish him, but also released him.
Paul sets forth two offenses in their punishing him. One is that they wished to punish him without trial. The other is that they wished to punish a Roman. Therefore he brought greater fear upon them.