Muslim Brotherhood is pretty much the rootstock of all the Sunni Jihadists, and groups like Hamas. This is how they, and many of the Salafi believing Sunni, that any negative done to Islam or to a moslem is grounds for Jihad action. They also have a big chip on the shoulder about what's insulting to Islam.
I think that the only thing the pope could do to make them happy is to say, Islam is superior to Christianity.
I also wouldn't be surprised if some person, seeing or hearing the text, decided to run with it, knowing that it could be used to put pressure on the church and pry Arab Christians out of the church and into Islam, where converting isn't just a religious thing, its a sign of solidarity against the evil westerners who want to destroy the middle east....