This is actually one of the reasons I wondered if there's could be an influence from summoner to summoned. That is, the Ixal feel as though their home has been taken from them, and, over time, have become more and more violent and desperate to get it back. (In the Gridania story they talk about the Ixal targetting the tree, which seemed like a new, rather brazen, thing they were trying to do both against the elementals and Gridania.)
