Water rights in Nevada are a State issue and have been since before the the BLM was formed (except in the Truckee and Carson River basins that are not involved in this issue). In short by closing the area the Feds have executed the beginning of a taking of a valuable asset without compensation. Open range grazing was common even when that part of Nevada was part of the territories of Arizona and Utah. You did say that Bundy wasn't paying his fees which he did pay to Clark County and they are holding in the County coffers. Bundy is no murdering open range cattle baron like you compared him to in the movie. Trust me, making a living off of a herd of 600 head is not the path to riches.
I apologize to the extent the comparison of Bundy to former cattle barons implied murdering other landowners. However, those cattle barons wanted to graze their cattle on land they didn't own. That's what Bundy wants to do.
Bundy has NOT paid grazing fees to Clark County. That's a lie made up by Bundy supporters, similar to the lie that this land is 'his' ranch.
From Breitbart and multiple other sources:
The protracted conflict began in 1993, five years before the land was ruled to be off limits for grazing, when Cliven refused to pay grazing fees to the BLM. “We [the public] own this land,” he said, not the feds. Bundy says he is willing to pay grazing fees to Clark County but not to the BLM."
I've yet to find a single source saying that Bundy has paid his grazing fees.
A court ordered Bundy off this land before the land was ruled to be off limits for grazing.