I do not see why they have to shoot a porn video in a place considered sacred by a partiular group. I must confess I admire the nerves of whoever did it.
That's what my grandmother would call asking for a shit rain.
The idea that by being scandalous or outrageous sells better is kind of twisted. Most celebrities actually engage in this philosophy: bad publicity is better than no publicity.
I think that one of the few things most countries around the world agree on is the unacceptability of public nakeness, let alone public sex (or sex in public places). If these places happen to be sacred or highly respected by the inhabitants of a given area, I do not se the point of provoking a reaction that they know will be negative and even agressive.
Of course, it is possible for porn creators to have a couple havings sex basically anywhere with the help of some special effects. It would be interesting to consider whether the film would be equally offensive or protested if it had not actually been shot on site.