I was an asshole, and I am very, very sorry that I was infuriating when I should've tried much, much harder to disagree gently. For years, I've insisted civility and tone matter. I have no excuse for the way I expressed myself, and you have no reason to forgive me, but I hope you will just the same.
Sincerely and abjectly,
PS. The original version of this post had a bit of discussion around it which, I realized, distracted from the apology itself. So I've discarded it. The apology is unchanged. Comments are still off.