The scriptures exhort man to delight in God's coming judgment of the world. Accordingly, the Westboro Baptist Church has made itself infamous for travelling the country "thanking God for dead soldiers" and proclaiming "no hope" for the world in God's coming judgment. Is that the idea? Certainly, they are rejoicing in what they believe is God's judgment, so why is the outcome so twisted? Most Christians hopefully don't revel in other people's misery, especially those they believe are roasting in "hell."
Let the heavens be glad, and let the earth rejoice; Let the sea roar, and all it contains Let the field exult, and all that is in it. Then all the trees of the forest will sing for joy before the LORD, for He is coming, for He is coming to judge the earth. He will judge the world in righteousness and the peoples in His faithfulness (Hb - enumah).
The Hebrew "enumah" was the word for faith, which they understood to be faithfulness. It means fidelity or loyalty. David, the prophet who was able to look forward and see Christ, is telling the heavens and the earth rejoice for God is coming to judge in righteousness and the people in his loyalty. God is loyal. And, it should be no stretch of the imagination to assert that God would be loyal to his Son's status as "The Savior of the World."