See the picture of the cut limb? (
https://kottke.org/plus/misc/images/broccoli-tree-vandal-01....) How it looks like there's a vertical crack in the limb, and kind of black in the middle? And if you look real close at the vertical cut, it looks black inside. Other parts of the tree seem to have large black spots too.
Well limbs don't just crack vertically when they're cut horizontally. Either someone hacked at it vertically (no real reason), or that black spot is the mark of black canker, a willow disease. The only fix is to cut off the diseased limb in the dormant season. And it's almost the dormant season.
Why did all the limbs get cut off? Dunno, maybe it had to do with canker too. But remember, plants are not here for humans' amusement - they often require trimming, chopping, replanting, large culls to prevent disease spread, and all kinds of other treatment to care for them. The end result may be an ugly tree, but a tree that lives.
I could be wrong. But it's best not to dwell on the worst of things if you don't know what really happened.