The author is trying to convey that even if there are evil people and bad things it is never late to turn to the good side and be forgiven. We can compare the Book of Jonah to the events happening around the world today. In the book of Jonah there are people doing evil things especially the people of Nineveh. There is rape, child abuse, prostitution, murder, and human trafficking. People such as these thought to be unforgivable and Jonah does not want God to be merciful to the people of Assyria but God is willing to have mercy, and forgiveness as long as the people of Assyria follows him and obeys him. In the modern day we have terrorism, rape, murder, prostitution, and child abuse but God like before will forgive these people if they follow
