I haven't studied all the facts and law surrounding this, so this is all speculation and generalization on my part. (No surprise, huh?)
Bundy fought and won a public relations war against the feds, enabled by our mile-wide and inch-deep media. Fortunately for him, the Duchess of York hadn't encountered any dress-lifting winds, the Beyonce/Jay-Z story hadn't broken, and Babba Wawa hadn't announced her big news -- so there was about 23:55 of cable news to fill each day. His 'government picking on the little guy' story sounded good enough that it whipped folks into a frenzy, especially paranoid people with guns and nothing better to do with their time.
I don't fault him for the crimes of the people that showed up, but I do think he needs to pay up or get out. If not, get the USDA out there and mention there might be a mad cow outbreak.