Does Islam incorporate witchcraft?

it all comes from the prince of darkness and he does have some power if you let him

No,we don't practice witchcraft. The Qur'an speaks against it as being evil (2:102)-

2:102. They followed what the evil ones gave out (falsely) against the power of Solomon: the blasphemers Were, not Solomon, but the evil ones, teaching men Magic, and such things as came down at babylon to the angels Harut and Marut. But neither of these taught anyone (Such things) without saying: "We are only for trial; so do not blaspheme." They learned from them the means to sow discord between man and wife. But they could not thus harm anyone except by Allah.s permission. And they learned what harmed them, not what profited them. And they knew that the buyers of (magic) would have no share in the happiness of the Hereafter. And vile was the price for which they did sell their souls, if they but knew!

not all sites that are mentioned in the name of islam or even written by muslims considered correct , just like not all sites that claim to be related to health are correct.

islam doesn't allow witchcraft, believing in it means a muslim is not faithful anymore and has to renew his faith

we believe there are witches and witchcraft, we just shouldn't practice it or else we are not believers anymore

many people try to search for ways to make muslims love islam more although it may have nothing to do with islam, so we should refer to more accurate sites, like official sites from known scholars or organizations.

Depends on your definition of witchcraft.

Do you consider the Christian practice of prayer to achieve a specific end or healing by laying on of hands witchcraft?

"Magic" is a very real thing and the mechanisms that make it happen are very similar across different spiritual traditions.

The repeating of a name...No

Wicca can incorporate any religion. Christian and their Enochian stylings and the Jewish and their Kabbalah.

I too would like to know if there is an off shoot in Islam.

Muslim Witchcraft

no, but witchcraft is just like any other religion that projects positive thinking in ones psyche. However, i think they are more on materialism than spirituality.

islam refuse magic clearly in koran but some muslim depend on fake hadith to practise evil and nonsense.

Wiccans have totally seperate beliefs. Their Gods and Goddesses have nothing to do with Islam.

In Sufism, the idea of the 100th name is most prominent. It has become the elusive object of mystic devotion, the symbol of God's transcendent being.

repeating each of the names a hundred times gives one special benefit- Try it and see if it works. I bet it won't.