This has been replied a million times. He (as) is replying to xtians and is QUOTING their information as per Bible and xtian beliefs etc to show xtians how derogatory xtians are to their prophets while Islam gives a respectable place to prophets.
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but the language he has to use these words???? Prophet Mohammad p.b.u.h was called many names but do true muslims copy them word to word( seems perversion)....they just say that they uttered blasphemous words....since it is a HASHIA so i thot u would say out of context blah blah......
i also wrote check out the vocabulary.