So you think Muslim historians were not strict about authenticating stories about the previous Messengers of Allah such as Adam, Noah, Ibrahim, Sulayman, Yusuf, Musa, and Ciisa, but somehow, by magic, they managed to avoid errors about the last Messenger? Pretty illogical. Scholars would never write things about the deen unless they believed in it because Allah would hold them accountable for spreading falsehoods about his prophets. You make it sound as though history is different from hadith. Hadith books are history books too. They're about the past.
Take these hadiths for example. They contradict the most basic things we know about Allah, namely that he is not a human being, but Bukhari says Allah looks like Adam:
"Narrated from Abu Hurayrah that the Prophet (peace and blessings of Allaah be upon him) said: “Allaah created Adam in His image, and he was sixty cubits tall. When he created him he said, ‘Go and greet that group of angels who are sitting and listen to how they greet you, for that will be your greeting and the greeting of your descendents.’ So he said, ‘Al-salaamu ‘alaykum,’ and they said, ‘Al-salaamu ‘alayka wa rahmat-Allaah’ So they added (the words) ‘wa rahmat-Allaah.’ Everyone who enters Paradise will be in the form of Adam, but mankind continued to grow shorter until now.”
Sahih Muslim says:
"Abu Hurayrah said: The Messenger of Allaah (peace and blessings of Allaah be upon him) said: “When any one of you fights his brother, let him avoid the face, for Allaah created Adam in His image.”
Do you think Allah looks like Adam and is sixty cubits tall? It's clear from the second hadith that he's talking about a physical resemblance because it says you should not hit people in the face because they have a similar face to Allah.
This contradicts the Quran which says Allah has no likeness. You should read what the defenders of the hadith say. Their desperation will make you laugh. They claim it doesn't really mean what it says it means. Anything but admit hadiths are not divine.