HAVE THE KORAN, HADITH, AND SIRA BEEN CORRUPTED BY JEWS?

Muslims say there are errors in the Bible, and that these errors are the result of the Bible having been "corrupted by Jews".

These errors are called Tahrif, and they include:

1) God ordering Abraham to sacrifice his son Isaac (Muslims say it was not Isaac, but Ishmael whom God ordered Abraham to sacrifice), after which God told Abraham, " “Do not lay a hand on the boy,” with Genesis 22:8 declaring, "God himself will provide the lamb for the burnt offering"

2) Regarding the identity of Jesus, the Qur'an says, "They indeed disbelieve who say: ‘Surely, Allah - He is the Messiah.'" (Surah 5:17, see also 5:72), whereas, obviously Christians believe Jesus was the Messiah, the only begotten Son of God, and the Word become flesh 

3) Regarding the crucifixion of Jesus, the Qur'an says, "They killed him (Jesus) not, nor did they cause his death on the cross, but he was made to appear to them as such." (Surah 4:157), whereas clearly, in the Bible, Jesus was crucified and died for the sins of the world. For Christians, this sacrifice is the central event in the history of the world, and is the Cornerstone of the Biblical story.

In all three of the above incidents, Muslims directly contradict the central story of the Bible, God's willingness to provide the needed sacrifice for the forgiveness of sins.

To believing Christians, this is tantamount to blasphemy. But, to non-believers, these changes would not be offensive, but would be merely tweaks in the storyline.

But, the Islamic Holy Scriptures themselves contain some very specific claims about the life of Mohammed which, if wrong, are not mere "tweaks" in the storyline, but are, most of them, disgusting abominations, whether true or not:

For instance,

1) Mohammed allowed a man to kiss him "from his bellybutton to his armpits"

2) Mohammed had gay sex with a man (not that there's anything wrong with that)   ---  

Sunan Bayhaqi and Al Halabi

According to this hadith, a  (gay) man named Zahir, who used to say, “The prophet loves me,” said that one day Muhammad crept unawares behind him and put him in a bear-hug. Zahir, alarmed, yelled, “Get off me!” After turning his head and discovering that it was Muhammad, he stopped struggling and proceeded to “push his back into the prophet’s chest.”

Sunan Bayhaqi, which traces to Sunan Abu Dawud (one of the six canonical hadith collections), has Muhammad lifting up his shirt for a man, who proceeded to kiss his entire torso, “from his bellybutton to his armpits.”

Tafsir of al-Qurtubi—an authoritative exegesis in Islam. Aisha said that, one day, while Muhammad was lying naked in bed, Zaid came knocking; Muhammad, without getting dressed, opened the door and “hugged and kissed him”.

3) Mohammed used to suck on the tongues of young boys and girls    -  "Musnad Ahmad," Hadith number: 16245, Volume Title:
"The Sayings of the Syrians," Chapter Title: "Hadith of Mu?awiya Ibn Abu Sufyan,"
Narrated by Hisham Ibn Kasim, narrated by Huraiz, narrated by Abdul Rahman Ibn Abu Awf Al Jarashy,
and narrated by Muawiya who said,
"I saw the prophet (pbuh) sucking on the tongue or the lips of Al-Hassan son of Ali ,
may the prayers of Allah be upon him . For no tongue or lips that the prophet sucked on will be tormented (by hell fire).

4) Mohammed did not die until he had sex with every woman he ever desired

5) Mohammed sexually "admired" 2-3 year old girl, declaring that the would one day marry her  ---   Musnad of Ahmad bin Hanbal, which records Muhammad seeing a 2-3 year old girl in her mother’s arms. Muhammad was so “impressed” by her that he said, “By Allah, if this girl reaches marrying age and I am still alive, I will surely marry her.”

6) Mohammed liked to wear women's clothing 

From Mishkat Al Masabih, Volume II

Book XXVI- Fitan.

Chapter XXXVIII, “The Fine Qualities of the Prophet’s Wives.”

She told that the people used to choose: ‘A’isha’s day to bring their gifts, seeking thereby to please God’s messenger. She said that God’s messenger’s wives were in two parties, one including ‘A’isha, Hafsa, Safiya, and Sauda, and the other including Umm Salama and the rest of God’s messenger’s wives. Umm Salama’s party spoke to her telling her to ask God’s messenger to say to the people, “If anyone wishes to make a present to God’s messenger, let him present it to him wherever he happens to be.” She did so and he replied, “Do not annoy me regarding ‘A’isha, for inspiration has not come to me when I was in any WOMAN’S GARMENT but ‘A’isha’s.” They then called Fatima, sent her to God’s messenger, and she spoke to him, but he replied, “Do you not like what I like, girlie?” She said, “Certainly,” so he said, “Then love this woman.” (Bukhari and Muslim.) (English translation with explanatory notes by Dr. James Robson, Sh. Muhammad Ahsraf Publishers, Booksellers & Exporters, Lahore-Pakistan, Reprint 1990, p. 1361; bold and capital emphasis ours)

7) Mohammed had sex with a mentally handicapped woman

8) Mohammed told his followers to tell uppity Infidels, "go bite your mother's clit - go bite your father's penis"   ---   “Whoever prides himself in the affiliations of Jaahileeyah, let him bite his fathers private part and do not speak to him.”
[Saheeh in as-Silsilah as-Saheeh #269, an-Nasaa’ee, al-Musnad (of Imam Ahmad)]

9) Mohammed had sex with Aisha when she was 9 years old  -  Muslim (8:3309) - Muhammad consummated his marriage to Aisha when she was only nine.  (See also Bukhari 58:234 and many other places).  No where in the reliable Hadith or Sira is there any other age given.    --- 

Bukhari (62:18) - Aisha's father, Abu Bakr, wasn't on board at first, but Muhammad explained how the rules of their religion made it possible.  This is similar to the way that present-day cult leaders manipulate their followers into similar concessions.   ---

Muslim (8:3311) - The girl took her dolls with her to Muhammad's house (something to play with when the "prophet" was not having sex with her).

10) Mohammed apparently had sex with a dead woman  ---  “Kanz Al Umal” (The Treasure of the Workers), in the chapter of “The issues of women”, authored by Ali Ibn Husam Aldin, commonly known as Al-Mutaki Al-Hindi. He based his book on the hadiths and sayings listed in “Al-Jami Al-Saghir,” written by Jalal ul-Din Al-Suyuti.
Narrated by Ibn Abbas:
“I (Muhammad) put on her my shirt that she may wear the clothes of heaven, and I SLEPT with her in her coffin (grave) that I may lessen the pressure of the grave. She was the best of Allah’s creatures to me after Abu Talib”… The prophet was referring to Fatima , the mother of Ali.
The Arabic scholar Demetrius explains : “The Arabic word used here for “slept” is “Id’tajat,” and literally means “lay down” with her. It is often used to mean, “lay down to have sex.” Muhammad is understood as saying that because he slept with her she has become like a wife to him so she will be considered like a “mother of the believers.” This will supposedly prevent her from being tormented in the grave, since Muslims believed that as people wait for the Judgment Day they will be tormented in the grave. “Reduce the pressure” here means that the torment won’t be as much because she is now a “mother of the believers” after Muhammad slept with her and “consummated” the union.”

So, my question is - as these stories all come from the Sira and the Hadith, which are Islamic Holy Scriptures - have the Islamic Holy Scriptures been corrupted by Jews?