But that's not the point being made. Lack of skills with the English language often make things worse, granted, but they're not the root of the problem targeted by 'msg'. The actual formulation makes that quite clear. Quoting "msg":
It's utter cluelessness, often combined with quite unacceptable attitude, that gets on people's nerves. The idea that a highly specialized technical USENET newsgroup (that may well exist longer than their own biological age) may not work quite the same way as their preferred chat forum, IM service or blog site, appears to stretch many a modern student's imagination beyond breaking point. A pity.
"Language" doesn't even begin to describe the kind of communication problems we're talking about.