It seems to me that the very same kind of generalisations about how Pakistani Muslims are corrupted by their culture which Jim interprets Keith as having made could rather more convincingly be made as respects Jim in relation to Catholicism.

And in neither case would the charge actually be accurate, so far as what has been written goes.

Sometimes we are tempted to go beyond what has actually been written or said, and read into it what we believe is the underlying belief system, and if it is sufficiently hateful to go for it tooth and nail. The danger is that in doing so we risk turning into the mirror image of what we believe we are attacking.