So is it somewhat equivalent to saying someone is protestant when they are catholic, and being outraged at such a mix-up? I still don't quite understand why it has emoted such apparent disgust as to stop reading, but then I am not a religious person.
I doubt it has anything to do with religion. He is inferring from the mistake of saying a Persian Muslim was an Arab that the author did not put much effort into research for the article, and so has decided it is not worth reading.
