I'd say that it's "easy" with regard of the resources on the spot. No hundreds of brain-washed fanatics. No tons of explosives. No extensive concealed digging

I'd say that it's "easy" with regard of the resources on the spot. No hundreds of brain-washed fanatics. No tons of explosives. No extensive concealed digging or something similar. No desperate suicide attacks or hot chases or anything else highly visible. Apparently no bucketloads of cash. It looks more like an elaborately prepared barbecue party: careful planning, getting all the details figured out ahead of time, coordination and, well, relatively calm execution.