What you said - the Feds are still scratching the itch from when their attempt to screw the Bundy’s met with so much notoriety - they need to “prove themselves right” and I pray they don’t opt for another Ruby Ridge/Waco type event. If they do, they will probably find they have let the snake out of the can and the spring is too strong to allow them to stuff it back in.
The feds would be industrial strength stupid (not out of the realm of possibility) to let an occupation(simple trespassing) of a small building, at a wilderness area, in the middle of Winter escalate to bloodshed.
I believe when the sun comes up they will find themselves ass deep in supporters not inside the building.