Yes he probably crashed the plane intentionally, but that’s not the regulation he broke.

Intentionally crashing a plane seems a pretty good example of piloting in a careless/reckless manner that endangers life or property. There's not a specific rule "they shall not crash your plane" but this is more of a catch-all rule for these kind of situations.

There's a big difference between forbidding "crashing a plane" and forbidding "recklessly endangering people and property". The most obvious example being: there are circumstances in which crashing is unavoidable. Sully, for instance, crashed a plane in a way that protected life and property.

It is much more precise to just forbid "endangering people/property" than it is to try to enumerate every action that could be dangerous and then adding exceptions.

is there such a regulation? the part I'm quibbling about is, they do express that he showed intentions