Scandalum Crucis (The Scandal of the Cross). In the preceding questions you addressed the problem precisely: Was putting His Son to death on the Cross necessary for the salvation of humanity?
Given our present discussion, we must ask ourselves: Could it have been different? Could God have justified Himself before human history, so full of suffering, without placing Christ’s Cross at the center of that history? Obviously, one response could be that God does not need to justify Himself to man. […] But God, who besides being Omnipotence is Wisdom and—to repeat once again—Love, desires to justify Himself to mankind. He is not the Absolute that remains outside of the world, indifferent to human suffering. He is Emmanuel, God-with-us, a God who shares man’s lot and participates in his destiny.
[…]If suffering is present in the history of humanity, one understands why His omnipotence was manifested in the omnipotence of humiliation on the Cross. The scandal of the Cross remains the key to the interpretation of the great mystery of suffering, which is so much a part of the history of mankind.
[…]God places Himself on the side of man. He does so in a radical way: “He emptied himself, / taking the form of a slave, / coming in human likeness; / and found human in appearance, / he humbled himself, / becoming obedient to death, / even death on a cross” (Phil 2:7-8).
—from Crossing the Threshold of Hope by Pope John Paul II in the chapter: Why is There So Much Evil in the World?