And to save any more missing the point stereotypes about Italians or New Yorkers waving their hands at each other in completely different contexts:
A stranger angrily waving their hands and unintelligibly shouting things at you would be frowned upon in any culture.
And that this has to be explained - again - to some people is unbelievable.
I actually wasn't sure if the original post wasn't just a parody of the archetypal ignorant English-speaker abroad, since it's such a staple of comedy.
Judging by the downvotes though, HN is absolutely crawling with similarly entitled egotists who blame other people for their own chronic laziness and ignorance when they condescend to grace other countries with their presence.
On the other hand, some cultures may suppress even severe anger.
Would you approve of the person who you consider damaged your property waving their arms about and shouting at you?
I don't think most people would, in any culture, from New York to Boston to Italy.
Anyway, this seems to be the hill you want to die on. You shall have it.
(I was blunt upon departure and it went swimmingly.)
Bonus clip: https://www.youtube.com/watch?v=lvwpNkJd82w&t=75