It is significant is that it’s not Christ’s teachings, His goodness, His miracles, His stories, nor even His life which is despised. The unsaved mind has no argument with any of these. What they find appalling is the gospel message that Jesus alone is the Saviour of the sinner.
Jesus said to him, “I am the way, the truth, and the life. No one comes to the Father except through Me” (John 14:6).
The power of the gospel (Romans 1:16) is found in acknowledging one’s inability to save himself, and trusting exclusively in the work of Jesus who died and was raised from the dead on the sinner’s behalf. This is the Jesus rejected by the world.
I declare to you the gospel which I preached to you, which also you received and in which you stand, by which you are saved … that Christ died for our sins according to the Scriptures, and that He was buried, and that He rose again the third day according to the Scriptures (1 Corinthians 15:1, 2, 3, 4).