As stated in your removal message, uncivil discussion includes cases of bickering, sarcastic replies, arguing, name-calling and the like. When you responded to a toxic poster by telling him "Ure literally what's wrong with this community." and that "Your ego is so high", you are participating in the toxic behavior by name calling and inflaming him further. We can understand people get upset and frustrated on the Boards, but that does not serve as a valid excuse to resort to the same sort of behavior.
In the future, it's best to disengage from toxic or inflammatory discussions and report offensive comments.
I'd also like to remind you that the removal was without warning or mark against your account; it serves as more of a friendly reminder/nudge in the right direction rather than an actual violation.
Here is a full copy of the removed comment; let me know if there's anything I can further clarify.
What does that have to do with the fact that you're wrong? Ure literally what's wrong with this community. Your ego is so high that the moment someone called you out for saying something that is factually wrong u attacked him by saying he is bronze instead of admitting you were wrong.
Learn to welcome criticism and you'll improve. High ego is what plagues this game