Earlier quoted context omitted.
I fail to see the distinction and its relevance. At that point we are discussing intention (stupidity vs malice) which makes it little better then analyzing for sarcasm. Benefit of the doubt goes both ways and the most charitable take is bad enough.
Fake nicety - I pretend to be your friend or thankful or praise you while not thinking much of you. Passive aggression - I am intentionally trying to insult you or be condescending to you or stanf in your way while keeping plausible deniality. Intention matters. The above sentence does nit sound like someone pretending to be nice or think well of you. It sounds like someone telling you they don't think much of you, w…
I think it boils down to what kind of costs are at stake. False positive for negative intention leads to conflict and breakdown of cooperation, while entertaining a passive aggressive person increases the burden on you in favor of continued cooperation and additional information.
While a direct stop is beneficial for short games, reducing false positives is beneficial for productive long games and comes at only temporary costs.
Or differently put, while stupidity is not always the better explanation then malice, assuming stupidity first can be beneficial regardless. If people are then unwilling or unable to fix stupid it becomes another discussion. But those false positives sum up quickly.