Regardless of intent, this behavior can have a significant negative impact on others.
Consider more plain language: "Even if you don't intend it, people can take this kind of language very personally."
(I actually think this statement is super important. So much of the arguing over "unwelcoming" behaviour seems to boil down to "But when I say X, I'm not intending to be a dick, I'm just saying X. People shouldn't be so sensitive.")
Consider expanding, "..., especially when their cultural background is different to yours."
“I came to get help, not to get my question edited.”
The "friendly" version of this comes off weird and passive-aggressive to me.
“Thanks for improving my question. I’m happy to provide any other info you’ll need to answer it.”
Suggestion that partially preserves intent:
"Thanks for the edit - I realise it was a bit unclear before."
Unacceptable behaviour
Unacceptable Behavior
No subtle put-downs or unfriendly language...
It seems slightly incorrect to start these bullet points as "No X" under the rubric "Unacceptable". The unacceptable behaviour here is the subtle put-downs or unfriendly language.
Culture
I'm surprised there's no direct reference to the number of different cultures using this same site. I'm sure that part of the problem is American users believing the site to be "American culture by default", and I think it would be worth directly addressing that. Even if just half a sentence, "people from many countries", or whatever.
