The way I look at it, the whole point of the band U2 is so that Bono can destroy civilization as we know it. The arguement goes like this:

First of all, Bono starts off a band and uses the name "U2," which is one of those annoyingly witty names that are clever at first, but get less funny every time you hear them. (a la "The Be Sharps" from the Simpsons) He then hires adequate musicians to make tolerable music, which he hides behind a message of peace in his homeland, so all of a sudden it's politically correct to listen to them. Then, gradually, over the years, as his fan base grows, he slowly makes the music worse and worse, until people all over the world exclaim, "I hate U2!" In all English-speaking nations, this is heard as "I hate you too!" However, since confrontation is also politically incorrect, the phrase will boil in the gut of whoever hears it, "Do they really hate me, or is it just a misunderstanding?" Eventually this will breed so much doubt and mistrust in the most powerful nations (read the US and UK) that it will spill over into the non-English countries. It'll probably degenerate into nuclear holocaust long before people get to physical combat.

Failing that, he'll just finally give in and put subliminal messages in his songs, simultaneously telling his listeners to give the music to their friends, while secretly hating them. Same effect.