if you take away guns, a person who wants to do harm will find another way.
that's the point though, take away the easily accessible options. you think a 14 year old kid is gonna figure out how to make anthrax? you think a crazy radical nutjob is gonna be as effectively lethal with home-made pipe bombs as just randomly unloading hundreds of high power shells into a crowd from 500 yards away
but no i dont believe that we'd all be safer if everyone was carrying guns around