The art in the museums shot up?
Not even a ghost of a link. It takes a lot of wishful thinking to skip right over the mad-as-hell domestic political faction with a raw wound and a matching M.O.
The target is the ghost in the Washington case.
As for the art, the amplifier for the demands
A series of random and unrelated events.
Have to wonder if the power companies have received demands for protection payments.
If it is criminal yes. If it is ideological, we know.
The skill sets present in that portion of the country are interesting. And skill sets are learnable, regardless of the motivations of the one learning them.
What is the political make up of the regions where the power outages occurred? What I mean is that of the areas where the outages occurred, not of the whole state. Politically motivated events tend to target the other side of the coin.