@boomerang,
You equated "taken" with "stolen."
My point is that many of the ranchers who've sold to the Fed over the last century were coerced, harassed, threatened with unwinnable lawsuits against an unbeatable opponent. Some truths and likely fractured truths that became myths boiled up in the ways ranchers deal with the BLM. Many ranchers claim the BLM's coercive strong-arm tactics to manipulate some landowners still happen - and that this type of behavior is part of the drama involving Bundys and Hammonds...
This seems analogous of black American historical chronology - More specifically, with people who think racism complaints should have ended with slavery. There is a long-standing relationship between the BLM and ranchers that is family lore to many and their lifeblood rests on these struggles and outcomes.
We might not be able to point to one moment in time and attribute behavior to it. It doesn't mean it's not life and death to them.