His family were close to both the Naqshbandi and Nurcu Islamic brotherhoods, and were involved with the Kurdish Sheikh Said rebellion in 1925 against the newly founded Turkish Republic.

Mirzabeyoğlu was influenced by the Islamist poet Necip Fazıl Kısakürek who published a magazine called Büyük Doğu.

[7] He is the ideologue and alleged leader of the Great Eastern Islamic Raiders' Front (İBDA-C), a militant Islamist group present in Turkey.

The bombings in Istanbul claimed 65 lives including that of the British consul general Roger Short.

[10] On 23 July 2014, he was released from prison, and on 29 November 2014 consulted with President Recep Tayyip Erdoğan.