Don't turn this into *everything you like sucks, but all the music I like is what everyone should like!*
You can't shift peoples opinions about the music they prefer. It's okay if someone like's Gaga, or likes U2, or likes both, or could give two shits for either. We can't all be the same. Don't attack someone if they're not into U2 (or any other band/artist.) You're free to like and dislike what you want, but allow others to do the same.
You wouldn't want someone responding to one of your posts saying: "What do you have against Lady Gaga?"
You just don't like her music. It's that simple. What do some members have "against" U2? Nothing, they just don't like their music.