I think what I was reading sounded like "there might be less gun violence over there, but don't look into why, it's not worth your while".
My thought was that maybe it is worth our while to look into why.
when one decides upon controlling guns, it would be prudent to grandparent people in. New rights revocation would only be applied to the upcoming generations. This way you don't alienate a population from something they hold dear, but would ensure whatever you're enacting becomes effective over time.