Granted, without the gun(s) this bigot would've had to cut his way through all those people to get his "raghead" quota. Or sissy slap them to death.
The old "guns don't kill people" argument is only true insofar as a gun needs someone crazy enough to point at a person before he pulls the trigger. Guns kill. It's why they were invented and it's why we keep using them.
No doubt that the primary culprit is the maniacal bigot behind the gun, and its **** near impossible to legislate the crazy out of people. Even if you could, there are too many guns out there on the black market to stop the truly dedicated nutjob. But let's not pretend that these horrible events would be no less deadly if he only had access to tasers and machetes.