Why is Jesus referred to as the 'King of the Jews'?

The title 'King of the Jews' serves a dual purpose in the context of Jesus' crucifixion. Firstly, it fulfills the expectations set forth in the Old Testament, such as in Jeremiah 23:5, where a righteous king is prophesied to reign. The inscription, as described in Matthew 27:37, highlights not only His identity but also the irony of His rejection by the very people He came to save. While the Jewish leaders sought to downplay this title, they inadvertently affirmed its truth by recognizing Jesus as the fulfilled promise of God’s covenant. Furthermore, the use of this title emphasizes Christ's sovereign authority, signifying that His reign extends beyond earthly understanding.