I was in NIR and am in the south, I am fairly sure I am more aware of what happened than you are
I can elaborate if you wish.
Angers, who were failing to make decent progress in the south, reached out to Mafia to get them to swap sides. Mafia agreed to a NAP with Angers, putting them diplo-locked with Angers, NIR, SH-IT. No room to grow. Once they had eaten the majority of the barbs, and noticed that without their assistance NIR was failing, they recruited refugees from NIR (for reasons I cannot explain). Angers continued to push against the refugees, as anyone would. Mafia did not defend their recruits, simply took them in and watched them fall. Once the players were tired of not receiving help, they left to reform NIR. This is when Mafia joined Angers in attacking them.
So yes, I would call this a gangbang. Would you not? NIR essentially at war on all sides.
About Mafia players being recruited to Angers, I can't comment much on the why, although based on what their recruits have said to me, it was to better relations between Angers+Mafia for the future of working together.
Can't speak for the KUWTK relations, but you are beating a dead horse. You sit here trying to make others look bad while having actually no idea who anyone is or what the situation is, lmao.