Far too often people think if one of the victims had been armed, or if a firearm was nearby the attack would have been averted. it was even more out on a limb to think everyone would have been armed and able to engage before being gunned down.
far more likely is if the bad guys are intent on murder and they get to pick the time to engage the CWW is in a very bad starting point. More so if the badguys had cased the joint.
Perhaps you should take a few deep breathes.