I don’t think its that complex. Group A gave permission for Group C to move into Group B’s place. Group C decided to get a bunch of Group N’s support to start the liquidation of Group B.
Decades of Group B, playing to the “Rules Based Order” crowd resulting in no end to the violence Group C was doing to Group B resulted in Group B being more and more okay with countering violence with armed resistance.
I mean, my home is filled with ancient laptops that we use until they explode, its a pretty common occurrence when trying to watch something streaming the ads would load just fine but the actual show wouldn’t actually load. So… shrug