"Angry people demand; professionals “require.” " YES YES YES--it's not enough to merely be aware of the connotations of your words. You must also be aware of any unintended information conveyed through their use. For example, despite being synonyms, the use of the word "demand" in this context exposes one as an amateur. It doesn't matter if you think this is unfair. It matters that you know all information conveyed,…
They always wrote in a language suggesting that their opinions emanated solely from objective facts that were not of their own choice. "The law requires you to comply" is a statement of fact. "I want you to comply" sounds more like a personal feeling.
It may be that "require" expresses the former, and "demand" the latter.