There was/is a kid at our church fellowship who, for lack of a better way to put it, is willfully and obstinately destructive. Maybe around 6 or 7 years of age.
I don’t know what the clinical term is for his behavior, but he seemingly cannot see something without destroying it. If he sees someone playing piano while holding sheet music in place with a book, he’ll forcibly swipe the book to the ground. If another kid is having a birthday, then it’s HE who needs to blow their candles, not them. If something is intact, such as a folded standing chair or table, then he may kick or push it over. If you’re constructing a tall stack of toy blocks or something, then you need to beware because he may smash it over and grin at having destroyed someone else’s construction. It got to the point where I became very nervous anytime he was near a baby stroller because he seemed like someone who might kick it over, baby and all, just for the lolz of it.
Telling him “no” is no solution at all - he’s been told that who-knows-how-many times and he will look at you and smile a knowing and acknowledging grin and deliberately wreck the thing anyway despite your having clearly said no. The kid’s parents don’t see his behavior as much of an issue - in fact, they even requested the other kid - the one having the birthday - “sorry, my son wants to blow out your candles, can you let him?”
What would be your approach if this were your kid, and what, if anything, can you do when it’s someone else’s kid?