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.
Here we are.
Well... if its mucus that's causing the resistance then the sperm need more power to overcome the resistance. So if a group clump together in a way that focuses the forces of their movement on a small section of mucus then they'll work like a group snowplow.