Taking something that does not belong to you is stealing.
If you go to someone else’s land and take their hay bales to feed your cows, you are stealing. Letting your cows graze on land that you do not own, that you have not paid to for the right to graze there, is taking the fodder and feed from that land and that land owner. That food has value and could have been sold to others via grazing fees.
Bundy was taking something that did not belong to him, from land that he did not own, without permission to do so. That is stealing - period.
I read through this thread and all I have to say is people need to read up on the decades of back story. More than just the Bundy’s are involved and decades of government bureaucracy and possible overreach and hurt egos and both Constitutional and Unconstitutional actions have occurred. I think people would have a more informed judgment if they knew a bit more of the full story and not just throw down the gauntlet over procedural and legal arguments while downplaying the livelihoods and personal dramas involved. The Hammond family saga in Oregon is really egregious actions have been taken by the government...
Here are some link that tells a bit of the tale. It is quite a long read but worth it.