Well they had no problem using the name Shaitan in Wine of Aluqah, along with Iblis.
And besides I didn't get the Islamic persecution part...surely no one will sentence Christofer to death as they did with Salman Rushdie.
I think Shaitan is not the same with Melek Taus. Yes, they are both Lucifer in the Christian tradition, but Melek Taus is more or less the Gnostic Demiurge.