How does the story of Nineveh relate to the mercy of Jesus?

The account of Nineveh's repentance under Jonah's preaching not only serves as an example of God's mercy but also points forward to the ultimate fulfillment of that mercy in Jesus Christ. Jesus Himself referenced the Ninevites as a testament to true repentance when He proclaimed that a greater than Jonah was present. This signifies that just as God extended mercy to the Assyrian Gentiles, He actively includes all people in His salvation through Christ. The mercy of Jesus is demonstrated as He fulfills what Jonah merely foreshadowed, offering complete atonement for sins through His sacrificial death. Thus, the conversion of Nineveh validated God's heart for inclusivity in salvation, highlighting that His mercy is available to all who believe, for His grace knows no boundaries.