There's no fanaticism like that of the converted, which Steven/Islam certainly embodies. But you're repeated use of the term "fatwa" suggests you didn't take the trouble to discern its meaning. Fatwa is simply an Islamic legal ruling issued by a recognized religious authority. It might be a death sentence as was the case with Rushdie & Khomeini, or it might be nothing more than a clarification of some obscure issue in Islamic law. In this case it's analogous to a psak in Jewish law (Halacha).