The apostle Paul references the “offense of the cross” in Galatians 5:11. The cross was an offense to the Jews because their idea of salvation was to “work the works of God” (John 6:28–29), meaning keeping the numerous burdensome Old Testament laws and rules. When Jesus came preaching salvation by grace alone, through faith alone, they were shattered. He made it plain that “by works of the law, no human being will be justified in his sight” (Romans 3:20) and that all their law-keeping was of no value to them whatsoever. Especially repugnant to them was the idea that, without Jesus, they who prided themselves on their meticulous adherence to the letter, if not the spirit, of the law, could do nothing of spiritual value (John 15:5).
Truly, the offense Jesus created was a stumbling block to the Jews, as Paul explained to the Romans. He reminded them of Isaiah’s prophecy that God would lay a Cornerstone (Christ) in Zion over which many would stumble and fall (Isaiah 8:14; 28:16; Psalm 118:22; 1 Peter 2:6). Just as the Jews stumbled over the idea of their works being of no value to God, so do many today hate the idea that Christ will build His church not on human merits, but on His righteousness alone. That message is as offensive today as it was in Jesus’ day. No one likes to be told there is nothing he can do to earn his place in heaven.
Equally offensive is the necessity of dying to self in order to follow Christ. Of all the religions of the world today, Christianity is the only one where its founder tells you to follow Him and die. "Then Jesus said to his disciples, 'If anyone would come after me, he must deny himself and take up his cross and follow me'" (Matthew 16:24). Those who heard this message knew exactly what Jesus meant; to follow Him was to die to self and give up everything they ever held dear. That’s why everyone ran away when He was arrested; they weren’t prepared to die with Him.
Correctness in the secular, political realm is not the concern of Christians or the church because “our citizenship is in heaven. And we eagerly await a Savior from there, the Lord Jesus Christ, who will, by the power that enables him, “bring everything under his control” (Philippians 3:20–21).