
It has become a habit for some people (especially atheists) to cast doubt on the reliability on the early Islamic sources regarding the early Islamic history, the Ahadith collections and in some cases the history of the Quran's compilation.
The most common is perhaps the Ahadith collections. They claim that since they were made so late they are very unreliable as historical documents, and they also bring up conflicting Ahadith from Sahih al-Bukhaari and then (ironically) ask which one is the correct, and use it in order to bash the isnad science, in order to prove its unreliability. They claim that the Ahadith were probably stories from Muslim folklore that were collected.
Then regarding the early Islamic history is in part connected to the Ahadith question, since doubting it comes after denying the Ahadith collections as reliable historical sources. The most radical theory is probably Hagarism which claim that the early Islamic history is "a pious forgery" and that even the Quran were probably collected 200 years after Rasul'Allaah (sall'Allaahu aleyhi was sallam) from multiple sources and that Islam as a religion evolved over the centuries and the Arabs who now were widespread among the Christians and Jews in the world in a great empire needed an identity.
There are also some theory circuling that the Quran must have been in either Syriac or Aramaic from the beginning. I've read the two articles from IA on the subject, but those contained more of ridiculing the theory rather than a refutation.
All in all, I would like some article which refutes these attempts to cast doubt on the early Islamic history altogether and shows that the Muslim sources are reliable.
Jazakum Allaah khairen.