Note 7 at 1Co 1:22: Paul's statement is not limited to the nation of Israel. He was speaking about the religious person versus the nonreligious person.

Those who already have some knowledge about God (like the Jews) want God to do something miraculous to prove the authenticity of the Gospel, while the pagans are trying to reason everything out. Neither way is acceptable to God. People have to humble themselves and simply receive by faith the message of the Gospel.