Except for the part where gun massacres weren't replaced with other kinds of massacres, shoot-outs at police weren't replaced with other kinds of police killings, and staff behind melee-proof enclosures are safe from being stabbed/etc... The bit where eliminating gun violence did reduce (not just transform) violence.

Since this has been turned into a personal soapbox for the pet beliefs of people here rather than a discussion about the incidents in Boston, I'm shutting it down.