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Avinash_Tyagi said:
^He isn't referring to the readers in those posts however, he's referring to those who are blind to what is actually going on.

Which, in a didactic website such as his own, is presumably a large chunk of his readership. Would you feel it was professional for your instructor to turn to the class and say something like "you're all idiots!", even if you knew he was not referring directly to you? If so, I think it's safe to say you're in the minority: most of us would feel that that behavior was inappropriate at best.