I agree that experienced WikiTreers should be patient with newts; there's a lot to learn here, and even many of us old-timers make mistakes.
That said, there's nothing inherently rude about being blunt or forthright. Yes, in some regions, like the one I grew up in bluntness may equate to rudeness. In others bluntness is baseline good manners or even a mark of respect. Even in the United States there's massive variation on what level of directness is polite, and WikiTree is an international site.
You shouldn't put up with abuse; if someone calls you stupid or uses foul language, absolutely report that. But if someone simply says "You did this wrong; here's the link to the page that says how to fix it", and you did indeed do it wrong and the link tells you how to fix it, they aren't insulting you.