What he specifically did to earn my ire was A) spread lies about me in public, B) ignore my clarification, C) specifically and deliberately respond to me and
then immediately blocked me, D) happened to share a server with me, E) happened to be Kira.
I would not have cared nearly as much if even one of the above facts were not true. But in this one instance, I found it highly satisfying to eviscerate him.