Islam critiqued digs up old calumnies; The prophet Muhammad, bewitched, possessed, or neither of the 2?

In answer to the video "Muhammad, Psychology and Satan"

There is no connection between the charge of demonic possession, and the hadiths about the prophet being bewitched.

Magic or witchcraft are qualified with the word sihr, from the root S-Ha-R meaning to make things look other than what they actually are, ie deception. There are 3 ways one can try and achieve that objective; the trick or slight of hand, the chemistry and the psychological manipulation, all of them meant at deceiving one into perceiving something else than what is actually occuring. These practices have therefore no intrinsic power. Sorcery at that time consisted of worshipping the jinn and straying from monotheism and that is why the Quran and the traditions warn against these practices.

Throughout the Quran, sorcery has always been associated with evil-mindedness, perverse beliefs, evil deeds and terrifying intimidation of people. It in addition is an act of apostasy to believe in the influence of false gods and the jinn who were worshipped in the process. Muslim jurists the likes of Malik ibn Anas considered sorcery as a manifestation of its practitioner’s perverted faith and prescribed punishments for it.

When relating Moses' public confrontation with Pharaoh's sorcerers, the Quran says that they

7:116"saharoo aAAyuna alnnasi/they tricked the eyes of the people",

the point being that magic is about tricking the eyes to think that what it sees is reality when it is not. There are some reports in hadith literature speaking of people attempting to bewitch the prophet, and even succeeding for a short lapse of time, confusing him in conjugal matters. In Bukhari and Muslim, the time span under which the prophet was affected is said to be 40 days. Weaker reports as narrated by ibn Saad from ibn al Hakam speak of 6 months. None however speak of whatever the prophet was afflicted with as "black magic". The scholars have referred to it as illusion, in conformity with the meaning of the word as stated earlier. It is known that to the prophet, besides being dutiful in his prophetic task of conveying the divine message, an area beyond the reach of evil interference, his second priority was being dutiful as a husband. Due to his outstanding daily responsibilities, the Quran gave him leeway in that aspect and yet, as attested in the traditions he would do his utmost to spend in an equal amount of time with each of his wives. Since this aspect of his private life was most important to him, he thus felt confused in that specific matter and in nothing else, by whatever evil had affected his perception of reality. It is not like the author of the illusion had intended to affect this specific matter in the prophet's life. Assuming the reports as true for argument's sake, a crafty magic trick/illusion can certainly confuse anyone momentarily, in any kind of matter, just as what happened to Moses as he was deceived by the sorcerers' slight of hand 20:66. 

Both Moses and Muhammad were eventually given the inner strength by God to heal from the effect. Further, something which is highly inconvenient to those Islam critics who mainly use those reports to discredit the prophet, he actually is described therein as receiving a vision indicating the author of the sihr as well as the location of the device he used. False prophets dont receive divine visions and after finding the device, the prophet doesnt destroy it because God cured him, meaning the tool used had no power in and of itself. 

"Those around him said: ‘O Messenger of Allah, should we not head toward that evil person and kill him?’ He said: ‘As for me, Allah has cured me, and I dislike causing evil to other people’. This is of the forbearance of the Messenger of Allah”.

To further corroborate the prophet, in such cases simply advised observing a certain diet, relevant to his own environment, composed of 7 ajwa dates of the type growing in Aliya near Medina, eaten over 7 days at breakfast as a means by which the body is detoxified as well as safeguarded from the psychological manipulations of sihr (the health benefits of that diet were thought to keep the mind sharp and aware against such endeavors).

This is far from, and not even comparable to the absurd idea proposed in the Greek Testament of Christians able to neutralize deadly poison in Jesus' name.

It is to be kept in mind however that the supposed confusion the prophet was victim of, never pertained to divine comunications, an area time and again declared as protected from any interference, human or else, from its descent from heaven until it is delivered to the prophet's heart and transmitted to the people. The Quran for example, in the context of truthfulness of prophethood and divine origin of the Book, repeatedly denies the claims made by his contemporaries that he might be demon possessed or under the effect of the jinn 16:98-100,26:221-3,69:41-2,81:22-25 or under a spell or that he is himself a magician/sorcerer 17:47-8,25:8-9,38:4,51:52-6 as other prophets were similarily calumnied.