well you said it yourself now. the reason. at least for me personally
what you classify as "liberation" is a war of annihilation in my book.
and it was not only related to BGS or npcs.
and i heard tons of statements from many people and saw mountain of evidences which proofes without any doubt who are the hostile occupiers here.
The Npc faction the Nameless was also just abused to hit the real players in EN.
from the charta of SPEAR: Our mission is to protect those who cannot defend themselves and to hunt down those who would obliterate them.
i personally will not rest until the people who did so much under great efforts at that time are able to live peacefully in their homeland again.
The home system for Explorer's Nation, to which the faction is native, is Union.
The home system for The Nameless, to which the faction is native, is Carcosa.
The game makes no distinction between a player minor faction versus an adopted NPC faction. Neither are fully owned by a group, nor does one have any form of priority over another. It's as meaningful for a lore-based player group to adopt a relevant NPC faction for the gameplay, as it is for an activity or other community based player group to have a player minor faction inserted into the game - which they then adopt and hope nobody else does the same.
Explorer's Nation as a faction in control of Carcosa is an occupation. The faction remained in Carcosa as part of a non-aggression treaty between the player groups of Loren's Reapers and Explorer's Nation - a treaty which SPEAR arrived in Colonia to break alongside their allies in EN.
Strange definition of annihilation - they remain in system as part of a non-aggression treaty. Then you guys break the treaty. Oh ...
The Npc faction the Nameless was also just abused to hit the real players in EN.
This line is particularly troubling as it seems to imply that SPEAR now consider BGS activity to be griefing based on how they categorise the people engaged in that BGS activity. Historically SPEAR has claimed that their interest is not in legitimate conflicts of BGS activities, only in senseless ganking.