There is too much trolling around in the dark, and some garbled and repetitive plot turns in the film, but, when the action breaks out across that slate-colored plain, Scott uses 3-D well, giving the movement persuasive depth.
The plain evidence from Tahrir Square is that Islamists make up only a fraction of Egypt's protest movement, albeit an enthusiastic and well-disciplined one, and that they have largely followed events rather than led them.