I'm not sure why the thread was posted in the first place, there was no "incident". It was a civil conversation between two rational people with a positive outcome.
That civil conversation is an incident:
in·ci·dent
noun
noun: incident; plural noun: incidents
1.
an event or occurrence.
"several amusing incidents"
[TABLE="class: vk_tbl vk_gy"]
[TR]
[TD="class: lr_dct_nyms_ttl"]synonyms:
[/TD]
[TD]event, occurrence, episode, experience, happening, occasion, proceeding, eventuality, affair, business;
[/TD]
[/TR]
[/TABLE]