And, I can tell the difference between a short answer and an unpolite answer.
This has been discussed a lot. It is an international forum. And different countries/cultures have different ways of communicating. As this forum has an overbalance of Duthc, I would say it is the Dutch that you are mostly referring to.
Have a loko here:
www.europeanmama.com/are-the-dutch-really-rude/
and this
www.amsterdamstay.com/are-the-dutch-a-rude-nation
The style of communicating with eachother may be perceived as rude. But in fact is the normal way of communicating. In a way, it is just what you are used to. The Dutch find a lot of other nationalities "fake" or "shallow" because "they never say what they mean". I suppose that is completely natural, if yu come from a country where you would consider the lack of sugar-coating in Dutch communicating "rude".
I would say there is no intercultural standard for "Rude".(e.g.,To flip the coin around: If I am asked "how are you", I would expect the person asking me how I am, to be interested in my state of being. Yet half of the world is very surprised, even annoyed, if I answer anything but the "I am fine, how are you". To who is rude there? The person pretending to be interested? Or the person who answers truthfully about how they are doing?)