Often morality has little bearing on legality. Many would say, if it was a male student and female teacher, it's the same, because both are illegal, therefore in their judgement, it's the same. No, nearly infinitely incomparable - reason would conclude.
Yes, we cut down trees (not endangered trees) that we ourselves want to save, from our perspective, not being the home owner, who has lived there for much longer than us.
If we cannot convince them to keep, we have done our duty. It still will be cut down, it's their land, if within reasonable distance from their abode.
This Sycamore felling, is incomparably equatable!
The kid who did this is obviously a punk, who never was disciplined enough in his youth.
His parents never walloped him enough, or ever, for infractions he did before.
He should be walloped publicly, for felling this obviously significant public asset.
It's not about just moving past the anger, it's about controlling the anger, and being reasonable.
There is rightful anger and unreasonable anger, important to differentiate.
If punks learned from this incident, it may save many more precious things of value, in the future.
It's a passive, placative response, to just move past the anger, doing so may have caused this, and will cause such things to occur in the future.