Mohammed 'revealed' an ayyat in the Quran which claimed that the Bible made mention of him... somewhere... but did not bother to say WHERE the reference might be.
This dangling, unresolved reference creates a VERY SERIOUS problem for those who follow Mohammed and His teachings. If Mohammed IS NOT MENTIONED in the Bible, this declaration by Mohammed would be at best another in the long line of baseless assertions made by Mohammed, at worst for the followers of Mohammed, it is a provable lie.
Therefore, Mohammed's followers TRY DESPERATELY to torture the Word of God into 'credentials' for Mohammed. And the 'Comforter' that Jesus promised is just such a reference that is tortured mercilessly to TRY and twist it to mean 'Mohammed' is the 'Comforter'.
But a CAREFUL and HONEST reading and examination of the DECRIPTION of the Comforter in John 14:15-17 reveals very clearly, and with absolute certainty, that Mohammed is... well, watch the video, and the Absolute Truth will become absolutely clear.