I'm not so sure you came off as smug or arrogant. Seemed to me you read one too many "pat little comments" and had a bit of a rant. That is ok, as it was decently written, coherent, and stayed on point.

If we want to start throwing around nearly antiquated terms of insult, it should be noted that the OP was being snide, and whackberry was being iniquitous. (This is true whether or not your comment was in fact smug btw).