That's a pretty shitty thing to do, but I'm seeing some pretty heavy comments levied at him, most saying he should get the maximum sentence (10 years).
While the guy was definitely acting like a douche, in the end, he toppled the Washington monument. An old monument, a historical monument, but still, a monument.
If someone managed to topple the Washington Monument would you then agree that the maximum penalty of 10 years was acceptable? The value of the trees is nearly inestimable - you can't simply replace them with new 130 year old trees. At least if the Washington monument was broken you could reconstruct it, and there would be a price tag.
I understand that you see it merely as a tree, but it should at least be obvious that:
* He didn't own the tree
* The value, even without any of the symbolism, is much greater than a few hundred thousand dollars (in terms of what it would cost to find another 130 year old set of trees, and make an effort to move them using heavy construction equipment to the new location, etc)
It was willful, malicious destruction of property. It's no different than arson on a 130 year old mansion.
So yes, even if you remove everyone's personal feeling about those trees, the willful destruction of essentially irreplacable property can yield a sentence of 10 years, and that would be valid.
Now you pile on the idea that it wasn't just any tree, but a tree which has value to the community as a whole, and it's akin to destroying a public park or building.
Would you agree that a 10 year sentence is reasonable if he had torched a small library? Community center? Elementary school?
On top of that, he bragged about doing this on radio! He could have readily done it and gotten away with it, but he wanted to inflict the greatest emotional damage on the fans that he possibly could.
The tree is essentially dying before their eyes. It's not like stealing a mascot - here today, gone tomorrow. It's like watching someone go through cancer - they look happy and healthy, but you know they've already reached stage four, and their inside are literally being eaten. And you just get to sit there, not being able to do anything.
But yeah, it's just a tree. Slap him on the wrist and be done with it.