I posted earlier on Bono's peculiar brand of Christianity (July 11, 2005). You can read here of another concert-goer's evaluation of one of Bono's "sermons" at a recent New York City concert.
It appears that after a set of songs, Bono pointed to his headband, described in the article as "the “C” in “coexist” was the Islamic crescent moon, the “X” was the Star of David, and the “T” was the cross of Christ. Bono pointed at the symbols on his headband—first to the cross, then to the star, then to the crescent moon.
What is more shocking is what happened next - "he began to repeat: 'Jesus, Jew, Mohammed—all true. Jesus, Jew, Mohammed—all true.'"
I don't expect Bono to be a theologian but he represents himself as a Christian - one who allegedly believes Jesus when the Lord says, "No one comes to the Father except by Me."