Magic was worked on Allah's Apostle so that he began to imagine that he had done something although he had not

Volume 7, Book 71, Number 661: 
Narrated 'Aisha:

Magic was worked on Allah's Apostle so that he began to imagine that he had done something although he had not.One day while he was with me, he invoked Allah and invoked for a long period and then said, "O 'Aisha! Do you know that Allah has instructed me regarding the matter I asked Him about?" I asked, "What is that, O Allah's Apostle?" He said, "Two men came to me; one of them sat near my head and the other sat near my feet. One of them asked his companion, 'What is the disease of this man?' The other replied, 'He is under the effect of magic.' The first one asked, 'Who has worked magic on him?" The other replied, 'Labid bin A'sam, a Jew from the tribe of Bani Zuraiq.' The (first one asked), 'With what has it been done?' The other replied, 'With a a comb and the hair stuck to it and a skin of the pollen of a male datepalm tree.' The first one asked, 'Where is it?' The other replied, 'In the well of Dharwan.' Then the Prophet went along with some of his companions to that well and looked at that and there were date palms near to it. Then he returned to me and said, 'By Allah the water of that well was (red) like the infusion of Henna leaves and its date-palms were like the heads of devils" I said, O Allah's Apostle! Did you take those materials out of the pollen skin?" He said, 'No! As for me Allah has healed me and cured me and I was afraid that (by Showing that to the people) I would spread evil among them when he ordered that the well be filled up with earth, and it was filled up with earth "

This passage is interesting in that Mohammad clearly admits that he was cursed, as he would be the first prophet in the history of mankind to be have an evil curse on him (assuming he is a prophet, seeing how Mohammad did not prophesize anything, and he himself said his greatest and only miracle was the quran (ofcourse it would be the greatest miracle if it was your only miracle, and where it is a miracle or not can clearly be argued).

But, the passage sheds light on Mohammad as an individual, and his entire credibility should be examined, once again.

1) If Mohammad bragged about things he imagined, how can any of his accomplishments be taken seriously if there is no one to corroborate those actions?
a) What things did Mohammad imagine?
b) Is Islam based on deception if Mohammad imagined his actions, and islam was based on his actions and deeds?
2) Why would a Jew put a curse on Mohammad?
a) What curse did he put on Mohammad with a comb, of all things?
3) If Mohammad had been cursed, why did he not remove those "materials out of the pollen skin?"
a) Mohammad's answer was that he was cured by Allah. But, couldnt he have imagined being cured by Allah, especially when the magic was to cause him to imagine things?

As we will see, Mohammad was a man cursed many times by demonic spirits, (by his own admissions), which must make one question how any holy deity could call him their messenger when this messenger was in the clutches of satanic spirits.