But according to his sister, police advised him not to attend after becoming concerned for his safety. Instead his father, Suhaib, head of the mosque's committee of trustees, posted a notice on his behalf expressing regret over his comments. "I seek Allah's forgiveness for my mistakes and apologise for any offence caused," the statement read.
The campaign is part of a growing movement by a small but vocal group of largely Saudi-influenced orthodox Muslims who use evolution as a way of discrediting imams whom they deem to be overly progressive or "western orientated".
Masjid Tawhid is a prominent mosque which also runs one of the country's largest sharia courts, the Islamic Sharia Council. In January, Dr Hasan delivered a lecture there detailing why he felt the theory of evolution and Islam were compatible – a position that is not unusual among many Islamic scholars with scientific backgrounds. But the lecture was interrupted by men he described as "fanatics" who distributed leaflets claiming that "Darwin is blasphemy".