If you're actually interested in Zealot, you shouldn't care about Aslan, or Fox, but about the man from Galilee: what was he like? what did he teach? was he the Christ? If you're looking for answers to that question, Aslan's Muslim faith, Fox's hostility, and any number of dreary facts about America's cultural grievances are strictly irrelevant.
What really sticks out to me in all the commentary is the inherent idiocy of Green's central (read: only) assertion: that Aslan's "Muslim-ness" somehow disqualifies him from writing about Jesus (here's a counterpoint to that from Buzzfeed, by the way). When she tries to bolster that argument by saying it would be akin to a Democrat writing about Reagan, it offers a clear window into the binary, yin or yang mindset that governs her thinking. Meanwhile, a whole mess of folks who probably hadn't even heard of the book before seeing the viral vid have helped shoot Zealot (which was already doing pretty well) to the top of Amazon's best seller chart, so well played, Fox. Well played.