Much as the Black Rose is the fault of the entire Source in the 8UC, and the Flood of Light is the fault of the entire First, and so it goes with every Calamity. I don't consider that to be a fair verdict in those cases, and I don't see it as fair here either. It's down to the actions of one isolated individual, who did his utmost to hide it from them while it involved an extremely elusive form of power.
No one is saying he's not the ultimate culprit here.
I don't think they ever wanted all the sacrifice in the first place - having the planet aetherically depleted until its regular functions ceased did not give them much room, though.
