Video: IDF destroys Hamas communication center without damaging the rest of the building

On Nov. 18, 2012, as part of Operation Pillar of Defense, the IDF
surgically targeted Hamas' operational communications capabilities on
the roof of a civilian building in the Gaza Strip. The IDF did not
target any other parts of the building.

This is the incident in which six Arab and Iranian journalists were hurt. Were they on the roof acting as human shields? 

Let's go to the videotape (