There was an incident that triggered a protest march, a peaceful, positive, American thing to do in such a situation. That march was made up of local citizens and some militants from around the country.
The outside militants of course were not satisfied with only a march and went on to occupy the federal building. They have refused to leave until ranchers, farmers and other private land owners have gotten full control of the tens of thousands of acres of federally protected lands.
It appears the militants failed to do their homework before leaving their homes in other states. This land cannot be given 'back' because it was never owned by the state of Oregon. These lands were part of the agreement the United States offered Oregan when it became a state in 1859. You can't give 'back' something you never owned.
Of course none of this matters to the militants, they're seeking trouble not truth.