Erik could simply ignore posts that upset him (for the sake of his heart, perhaps he should do that occasionally), or he can be critical of the post. Doing the former leaves the poster without an answer to his problem and no indication of why. The latter might upset the poster, but at least he knows. The poster has a duty to make the reader's job as easy and lucid as possible. We all understand when it's simply language translation that gets in the way, and forgive that (even Erik, who's first language is not English).

Neil's advice is absolutely to the point - learn to deal with difficult people. In my 55 years of life experience, the cleverist guys rarely suffer fools gladly. You have to work at getting help from them. It usually pays off.

Dave