According to the BLM Bundy had no land use rights because he refused to pay the grazing fees. So from their standpoint they were acting lawfully.
We really can’t obey or morally respect a “lawful” authority that gives illegal & unconstitutional orders.
I don't disagree with you in theory. But it gets back to the question of who gets to decide if an order is illegal or unconstitutional? Or do we, as Graham seems to be suggesting, assume that any order from any person in authority, be it police or prosecutor or BLM or TSA or any other government abbreviation, is giving a lawful order merely because of the position they hold?
The point you seem to be making has some validity. And the answer is that if you reject the authority of any person or persons, then you must be willing to accept the consequences. Further, when force is countered with force, war ensues. And so it goes. Hopefully you are not advocating war in the streets, but that would be the direct consequence deriving from your analysis.