Petra this is B* all to do with the Islamic religion. A lot of Muslims just happen to live in countries which practiced this centuries before Islam.
Islam started as a religious cult in (ca. 570–632 AD ) Mohammed was last in the line of Judeo-Christian prophets in about AD 610.
news.discovery.com/human/female-genital-mutilation-begin-121210.htm states that.
"This was not common practice in ancient Egypt. There is no physical evidence in mummies, neither there is anything in the art or literature. It probably originated in sub-saharan Africa, and was adopted here later on," Salima Ikram, professor of Egyptology at the American University in Cairo, told Discovery News.
Historically, the first mention of male and female circumcision appears in the writings by the Greek geographer Strabo, who visited Egypt around 25 B.C.
"One of the customs most zealously observed among the Egyptians is this, that they rear every child that is born, and circumcise the males, and excise the females," Strabo wrote in his 17-volume work Geographica.
A Greek papyrus dated 163 B.C. mentioned the operation being performed on girls in Memphis, Egypt, at the age when they received their dowries, supporting theories that FGM originated as a form of initiation of young women.