This is an example of adult spiritual spoiled brat syndrome. It is yet another case of someone having an adequate chance to pursue a course of scriptural truths from God's word that they have heard of; but deciding to sit, rebel, test, and be insolent instead. Dig this:

"You speak in signs and wonders
But I need something other
And I would believe if I was able
But I'M WAITING for the crumbs from your table."

All the evidence that people need that God's words are true, and that they owe to follow and OBEY them is built into people's consciences; testified by creation around them; and verified by history, honest science, and the state of the world - fulfilled prophecy.

People who really don't want to bother themselves with obeying ALL of God's commands make excuses. Today, as in the time Christ walked the earth, rather than admit to Jesus' rightful leadership and the truth of his teachings, THOSE WANTING TO STAY IN DENIAL KEEP WAITING FOR "A SIGN".

Jesus response to them was: "A wicked and adulterous generation keeps on seeking for a sign, but no sign will be given it except the sign of Jonah. With that he went away, leaving them behind." (Matthew 16:4) After Jesus rose from the dead after three days as Jonah prophetically came out of the belly of a fish after three days; it should have been clear to the Pharisees and others what Jesus meant, and that this is something God carried through. Nevertheless, many of these wicked people failed to change their mind even after this.

Crumbs? Whose "crumbs" is Bono waiting for - ones from Jesus, as in the biblical account this is obviously copped from? In that case, here's a question: Why? That makes no sense. If he's borrowing language right out of God's book, why is he ignoring its context? In the scriptural account, a Phoenician woman, not of the Jewish nation, which Jesus was assigned to help first, requested help from Jesus. Jesus let her know by metaphor that (at that time) his service was to be primarily to the Jews; but she humbly responded: "Yes, Lord; but really the little dogs do eat of the crumbs falling from the table of their masters." Jesus praised her great faith and helped her (daughter)immediately. (Matthew 15:21-28)

Nearly 2000 years have gone by. The time has long since past of Jesus's preaching basically only to the Jews, with others waiting for "crumbs", as it were. Even before he left the earth, Christ's followers were told to "make disciples of people of ALL the nations...teaching them to observe all of the things I have commanded you." (Matthew 28:19,20)

So Yahweh/Jehovah and Jesus' Christ's teachings, in full slices of the "bread of life" rather than crumbs, have been available to the world, plentifully, for a long, long time.

The real question is WHY some people haven't done what they should and picked up the whole good slices to eat them - as God has made clear that they need to do. It would be a mistake to wait for any further "sign" to do so - they're already all there.