I do not suppose it to be possible to accuse anyone of anything in a civil manner. Accusation belongs to prosecutors, mothers in law, schoolteachers and other beings that are clearly on a higher plane than one.
Civility is a difficult, but simple, art, necessitating primarily that one should wish to get along with another: onan does not seem to be going out of his to make himself agreeable to pg or anyone else in this exchange.
Forking the conversation, but going out of your way to make yourself agreeable is not efficient conversation. Now, the workplace and an Internet forum may differ in terms of environment, but if I applied "going out of my way to be civil" to the workplace, it would make for a lot of inefficient conversation and meetings. Being direct is much more preferable in the workplace, and as long as you leave out insults and profanity, it can be quite civil. That is what I'd expect in everyday life as well. My standards of comparing the workplace and other environments may not be shared.
Perhaps you would prefer people use more phrases like "I think", "I feel like", or pose sentences as questions. I suppose that works well enough for me without destroying conversation efficiency too much.
The word "accusation" has a broad spectrum of emotion, but perhaps a very narrow emotive connotation when heard by the accused.
Civility is a difficult, but simple, art, necessitating primarily that one should wish to get along with another: onan does not seem to be going out of his to make himself agreeable to pg or anyone else in this exchange.