Keep in mind, it's not the federal government claiming the turtles are the reason, it's Bundy making that claim.
The government claims it's because he hasn't paid grazing fees for 20 years.
Thought I saw the other day that some enviroweenie group sued BLM because they hadn't made him get his cows off the land. If BLM doesn't actually own it, and it hasn't been in a State court the old coger may have a point.