oh thanks, I was condiering getting it, but since I dont have any of the rest of battle of the atom, and since it sounds like a silly tantrum ( out of character, but thats bendis ) on her part, perhaps no
Kitty sided with the idea that the Teen X-Men had the right to do as they wanted, whereas Wolverine, Storm, etc. wanted to ship them back to the past.
I'm not sure how out of character it really is. Kitty has always been prone to tirades and such, only now she's old enough to go away when she's mad.