Aqizzar, you don't get it. When you are associated with another group running an agenda that isn't "lulz first and always", then it isn't an anonymous action. It is an action taken by an organization who is attempting to use the anonymous brand to push it's own ideology, but they aren't in it for the lulz. They are in it for an agenda.
That is what everyone forgets about anonymous. Anonymous is just as likely to hack a facebook shrine to a departed person and rule 34 it up as they are to post secret documents that save the world. It isn't about the cause, it's about the lulz. There are some unspoken ideals that most of anon agrees on for the most part, but like you said, they are all and therefore they contain the other extreme. The problem with this wasn't that some secret group inside anon wasn't responsible, it was that the person who did it is a part of a different organization with an agenda. As such, it wasn't anon, instead it was "secret".
Anon will no doubt hit westburo again, it is just too loaded with lulz for them not to now. Creepy smile girl has ensured that the world knows about the lulz to be had. They just have a lot more things they can do right now by people less trained at taking it, and as such hitting westburo isn't as fun. I am sure they've got random crap thrown at them just from the sidelines because they are now in Anon's radar, but the whole thing started by a group with an agenda, so wasn't really an Anon action.