God said "Go!"  Jonah said "No!"
Jonah did not have compassion on the people of Nineveh.  They were not his people and they were not God's people.  They were an evil people who should get what they deserve.  However, God had other plans and His plans would come to pass.  God would use a storm, sailors, and a great sea creature to extend His grace and mercy to the sinners in Nineveh through Jonah.