"We are free to change our religion or to abandon religion - not options open to Muslims."
In Indonesia Muslims can change religion. I read recently a daughter of the first Indonesian president's changed her religion from Islam to Hindu, and the former governor of Jakarta, Ahok who is a Christian, married a Muslim who then converted to Christianity.
I also read about some Muslims who became Christian evangelists and Christians who became Muslim clerics in Indonesia, a country with the most Muslim population.