I also think it is alienating (and rather offensive, to be terribly blunt) of you to argue that "they are used to violence" as if that means it somehow affects the population of cities like Beirut, the sense of loss felt by the families of victims, or any of the other human emotional elements.
Beirut is as much a large, cosmopolitan, vibrant city as any in Europe. It is no war zone. And it would do everyone good to remember that the very real and visceral trauma that the Paris attacks constitute is something many people feel on a weekly (or more frequent) basis, and that doesn't diminish the subjective horror of it.