From a libertarian perspective, a person owns their own self, name and likeness. It's available to others for fair use, but attempts to profit on having grabbed a domain first in order to exploit or profit from someone else's name doesn't strike me as "free market" or "libertarian".
You CLAIM it was supporters. They don't appear to be ACTING like supporters.
Words mean NOTHING. ACTIONS mean EVERYTHING.
If they wanted to charge for expenses and trouble, that's one thing. But $250,000? Please. Those aren't actions of supporters. They are actions of ENEMIES.