>>1717758The shitskins would be relatively powerless and unorganized without them.
They basically heard the shitskins from province to province, allowing them to destabilize, pillage and "free" other shitskins as they go, before finally bringing the colossal shitskin horde to westeros.
For the most part they remained hidden during the process of destabilization, preferring instead to use propaganda and then threats of force when that failed. But now they fly free and gleefully show themselves to the cowering white man. Letting them know, just before the end, that ((((they)))), clearly, are responsible for the shitskin horde at their door.