Article by Myriam Francois-Cerrah
"Critics allege that Aisha was just six years old when she was betrothed to Muhammad, himself in his 50s, and only nine when the marriage was consummated. They base this on a saying attributed to Aisha herself (Sahih Bukhari volume 5, book 58, number 234), and the debate on this issue is further complicated by the fact that some Muslims believe this to be a historically accurate account. Although most Muslims would not consider marrying off their nine-year-old daughters, those who accept this saying argue that since the Qur'an states that marriage is void unless entered into by consenting adults, Aisha must have entered puberty early.
They point out that, in seventh-century Arabia, adulthood was defined as the onset of puberty. (This much is true, and was also the case in Europe: five centuries after Muhammad's marriage to Aisha, 33-year-old King John of England married 12-year-old Isabella of Angoulême.) Interestingly, of the many criticisms of Muhammad made at the time by his opponents, none focused on Aisha's age at marriage.
According to this perspective, Aisha may have been young, but she was not younger than was the norm at the time. Other Muslims doubt the very idea that Aisha was six at the time of marriage, referring to historians who have questioned the reliability of Aisha's age as given in the saying. In a society without a birth registry and where people did not celebrate birthdays, most people estimated their own age and that of others. Aisha would have been no different. What's more, Aisha had already been engaged to someone else before she married Muhammad, suggesting she had already been mature enough by the standards of her society to consider marriage for a while. It seems difficult to reconcile this with her being six.
In addition, some modern Muslim scholars have more recently cast doubt on the veracity of the saying, or hadith, used to assert Aisha's young age. In Islam, the hadith literature (sayings of the prophet) is considered secondary to the Qur'an. While the Qur'an is considered to be the verbatim word of God, the hadiths were transmitted over time through a rigorous but not infallible methodology. Taking all known accounts and records of Aisha's age at marriage, estimates of her age range from nine to 19."
I believe Islam is a false religion and there are plenty of things to dislike about Islam. However, rolling out the stock Islamophobic claims is not very helpful.