To answer the original question, my personal opinion is “no, U2 is not Catholic”. The group as a whole seems to have fairly disparate ideas on God and religion. For the most part they seem to stay as ambiguous as possible regarding their religious views. I love the band, love their music and have almost every CD out there. I have a subscription to
u2.com website, and have the book “U2 By U2”. I did some searching through those, but I couldn’t find anything pointing at the band’s religious preference. I ran across some (very) dated articles on line. One from several years ago at Beliefnet
beliefnet.com/story/67/story_6758_1.html talks about some of Bono’s religious views, but again, doesn’t get into too much detail.
All I know is their music really moves me. I can listen to them all day long and never get tired of them. I’m sure I’ll catch some flack for this… but… Best Band EVER!