Is destruction of property what you expect from civilians?
Yes, sadly, 1% or less[1] of civilians are are going to be stupid and riot instead. And that is unacceptable.
Should they be reprimanded?
Absolutely. And we have specialized government entities that can utilize appropriate-force to reprimand them.
Is unwarranted destruction of property what you expect from police?
Yes, sadly, 1% or less[1] of police are going to be stupid and abusive. That is unacceptable, their job is to protect and serve. Even from each other.
Should they be reprimanded?
Yes! but we as civilians have no legal way to do this, and even the "good cops" have no good way to do this.
[1] We do not have data for either of these figures, so 1% is being used as a placeholder, and is not meant literally. I suspect that the percentage of criminals in the general population is far bigger than the number of police who destroy property for no reason, but I admit that I have no data for that.