Accessibility to guns is naturally a factor; if guns were inaccessible to people, gun violence would certainly go down.
But let's not confuse accessibility with legality.
The criminalization of gun ownership has little bearing on their accessibility.
Hey... drugs are illegal... that sure keeps them out of the hands of our citizens, doesn't it?
Taking away our rights to bear arms to try to prevent violence is like... well, it's like something that's a good analogy. Maybe it's like a ship "tacking" back and forth in the wind....
One thing I do know. If everyone in that school in Illinois had been armed, there would have been no massacre.
Ever hear the story about the robber who tried to hold up a gun store?