You point is generally good, but I don't see it as a contradiction to the article. There's nothing inconsistent in saying, "You should be considerate in your manner of communication," while at the same time saying, "When you are criticized or contradicted, try not to take offense." The two guidelines are compatible.
I agree. The advice is sound. I wasn't taking issue with the advice, only with the premise that society as a whole has adopted the standard "You can be an asshole, as long as you're right."
Maybe, phrasing it more positively, I would add to the advice. (1) Try not to be an asshole, as you're winning an argument. (2) Don't try to win an argument by demonstrating that your opponent is an asshole.
Some people tend to foget about (1). Others tend to forget about (2).
