I prefer Oasis to RHCP but I can understand why Noel on his own would open for them. I suppose it is a larger debate since this is occuring in Ireland (as oppsed to, say, the state of California).
I don't think there's any REAL debate. Sure, there's the odd hard die Oasis fan that says that everyone in the world should be supporting Noel, but I think that it's obvious that a just-formed band like the Flying Birds (despite having Noel and his Oasis catalogue backing up them), can't be headlining any major concert where U2, RHCP, Pearl Jam, Muse or Coldplay (just saying 5 of the biggest bands out there) are playing too. I mean, you can like or dislike the RCHP but you can't deny they have a +20 years successful career, while Noel has just started over.