Sounds like it's time for GreenPeace USA to follow the chemical industries example - do a corporate reorg, put all the liabilities in specific subsidiary and then declare bankrupacy for that subsidiary.
That’s specifically illegal under bankruptcy law. It’s called fraudulent transfer.
The proper way to do it would be to let Greenpeace USA go insolvent and then immediately form GreenPeace America as a new entity unhindered by the liabilities of the old one.
This tactic has been used by our current President.
I assume that is the point of having a Greenpeace USA -- to shield Greenpeace International and other Greenpeace organizations from liability. And it seems to have mostly worked.