Mustafa was sent to Tura prison originally, but was transferred to one of the concentration camps for the Islamic extremists where he encountered different readings of Qutb’s Signposts, where the youth followers had split into several branches of thought.[20] Mustafa joined the Qutbian group of Brothers that sought “complete physical and spiritual separation from the jahiliyya society.”[21] This ideal was based on Muhammad’s hijra from Mecca to Medina, “whereby the Prophet removed his band of believers from the dangers and corruption of the unbelievers.”[22] This group of Islamicists that were eventually led by Mustafa were known as al-Takfir wa’l-Hijra, and based on the ideal of complete separation from the jahiliyya society; they became a modern version of the Kharijites.