@U2 has a lot of the same debates/arguments along exactly the same lines, but I think it's just not as 'tight' as in here. So opposing opinions aren't backed by 10 years of 'knowing' the other person, if you know what I mean, seems to keep the heat down. There it's like "I understand what you are saying and you make a compelling argument overall, but I must respectfully disagree on your second point", while here it's like "YOU'RE WRONG ARSEHOLE!!!"
And beyond forums, a lot of the U2 disagreements are the same in the 'real' world too, to some degree anyway. I find that any time someone mentions they're a U2 fan, and you start to talk U2, pretty quickly they'll neatly slot into one of the main camps displayed here and everywhere else. Pop was shit/Bomb was awesome, no, Bomb was shit/Pop was awesome. Or whatever. There are just a few very strong lines drawn through the fanbase in general. And it's a long and varied career, career narrative that actually isn't wholly consistent globally, passionate fanbase, music in general is a passionate subject, can't avoid it.