I think the concern is not that people called him out when he was wrong, but that one person phrased it very rudely.
[1]:http://en.wikipedia.org/wiki/File:Grahams_Hierarchy_of_Disag...
And nobody claimed that it does. They simply pointed out that it's kinda weak to be an asshole in response; the fact the the asshole had a point doesn't make them not an asshole "Yeah but he's right". That's great, but not the point, and was also mentioned by the very people criticizing the asshole for being one. All further responses to that just went in circles, attacking strawmen like you just did.