Romans 9
2 I have intense sorrow and ceaseless pain in my heart.
3 Indeed, I could wish that I myself were condemned, and banished from Christ, for the sake of my brothers, my fellow-countrymen according to the flesh.
Paul was willing to spend eternity in Hell if God allowed it in order for the Jews to be saved!
If we loved others so much that we would trade places with them if they were condemned to Hell, can you image how much more peaceful this world would be?