Currently both Xeno and Insurgency are rephacked hostile towards each other as seen on Mactan, however when Xeno and Insurgency are present in the same system (such as Bering, Texas, Kansas, etc) the Xeno trigger the Insurgency to go hostile as well, even when the player is neutral towards the Insurgency. Also, currently killing Xeno has a negative impact on Insurgency reputation. Given the state of hostilities between the two factions I would expect them not to be connected to each other in any way. This may be a remnant of the Hellfire Legion ID that was re-used for the Insurgency ID that needs to be cleaned up or adjusted.