But it displeased Jonah exceedingly, and he was angry.
This is the first clue, after Jonah’s initial repentance and trip to Nineveh, that his heart was still not completely right with God. One can do the will of God without doing it with the right attitude, and that is the focus of the remainder of the book. The repentance and good deeds of the Ninevites pleased God, but they displeased His representative. They made God happy, but they made Jonah unhappy. A literal translation might be, "It was evil to Jonah with great evil." Until now evil (Heb. ra’ah) described the Ninevites, but now it marks the prophet. Consequently Jonah now became evil in God’s eyes and in need of punishment as the Ninevites had (cf. Romans 2:1), but God showed Jonah the same compassion He had shown the Ninevites.