AntaeusFeldspar

... if you have to lie about it.

"Yeah!  He called her fat!  Really and truly, he did, that's really what he said!  I am totally not lying and putting words in his mouth that he didn't say!  And, and, and, and then he totally ran away crying when I told him off!  Oh, yeah, that's totally true, that's exactly what he did!  That's totally not something that I made up!"

Since some people are better artists than they are logicians, I will spell out that this is an old technique known as setting up a straw man.  It is generally regarded as an admission of failure on the part of the person who feels that, in order to hold their own in the conversation, they need to control both sides of it.

What is "rude" in artistic feedback?

If the lead character of your novel was intended to be a lovable eccentric, and the people who read your novel find him instead creepy and unpleasant, is it rude of them to point that out?

If the play you're putting on is supposed to rotate around a character who's been worn down by a long life of heavy responsibilities, but in the part you've cast someone who's clearly young and inexperienced, is it rude for any of your audience to say anything about that fact?

If you've taken a photograph of someone in a costume that's specifically associated with people of a certain age, and in the photograph the model definitely looks like someone of a much different age, is it rude to say something about that?