"Readers are influenced when they consider the source and essential messages are obscured by the prejudice."
Yes and that's too bad. If in fact there is prejudice there. The only type of people I personally have a prejudice against are the ones that can see their view only.
But then again, at times there's ONLY one way to ammend some problems. And no room for argument. Therein lies the problem for the ones that can't quite see the light.