Aside from being a hunting tool and a defense mechanism, it seems for some that a gun is now a device to reduce or allay their fears and insecurity. Many, if not most, of those who support gun freedom and feel there is security in gun ownership seem to be afraid that someone is going to try and rob them, threaten their life or the life of someone they love, take away something that belongs to them or infringe on their rights.(H/T: GunWire - 5/10/14)
This resultant belief and comfort is under the assumption of course that a gun will somehow make a difference and prevent a tragedy or unwanted event. Further, they don't seem to trust the government or the police to do the job.
Response #1: To quote Dr. Leonard McCoy, of the Starship Enterprise:
"Jim .. you're an idiot!"
Response #2 (somewhat longer)