Given that the Order assists Corsairs, they are a fair game for the Zoners. If the Order wouldn't like to get shot, they wouldn't be involved in this conflict in the first place.
As for the Core teaming up with the Outcasts - players will always do player things. Order assisting Corsairs is the same nonsense given that the Xeno Relics are alive and dangerous artifacts, and Corsairs are happily selling them on the blackmarket, basically spreading dangerous alien tech among Sirius.
It appears that you are not grasping the main idea, do you? The ZOI in Theta is under our jurisdiction, and naturally, we will intervene when our allies are being destroyed. However, we refrained from attacking the zoners as they are on good terms with us.
