I'm neutral on the whole religious book burning thing. If I'm not mistaken, both religions wish each other to eternal damnation in the afterlife anyway, so burning a couple books is pretty minor and symbolic. It's just beating a dead horse. Or setting one on fire I guess.
I'm also pretty much pro- anything that pokes fun at islamic faith in hopes of either desensitizing them to how the rest of the world works, or giving the rest of the world a bit of a backbone to stand up to extremism. Ideally some of both.