How does unbelief relate to God's mercy?

In Romans 11, Paul points out that through the unbelief of Israel, mercy has been extended to Gentiles. This radical grace demonstrates God’s absolute sovereignty; despite Israel's rejection of Christ, He employs their unbelief to bring about mercy for others. Paul emphasizes that all have been concluded in unbelief to showcase God's mercy on all, revealing His justice intertwined with grace. This profound truth encourages believers that even in rebellion, God's sovereign purposes operate toward the eventual redemption of many, invoking awe at His unsearchable judgments and ways.