Sorry, but a Gaian-Kusari alliance makes no sense at all. Kusari wins, then they finish terraforming Harris and exploit Gaia/Eden/whatever that planet is. It does absolutely nothing to further the Gaian's goals.
I seem to recall reading some rumor saying that the Bretonian government didn't even prosecute Gaian prisoners, they were generally just released. Probably because they have real political representation, as well as not being randomly violent or a serious danger when compared to the Corsairs and other threats.
