Idolatry

Idolatry
Jonah makes an amazing statement in his prayer recorded in Jonah 2. He says that those who cling to worthless idols forfeit God's grace. I wonder if he was thinking about the sailors or the Ninevites when he said that. I am certain that he wasn't thinking that it was he who was the one who was clinging to worthless idols. His idol was his nationality. He was not an isolator, he was a Hebrew and they worshiped the true God. So Jonah repented, not of his idolatry but for running from God. How could he preach grace when he had forfeited grace by cling to his idol?