I don't think you can convince people to change their minds
The US banned assault weapons 1994-2004 (mass shootings decreased), and did not move beyond that, so maybe that would calm some.
But I think that success would probably be more likely by motivating those who, up to this point, don't care much about this, rather than convince NRA members to change their views.
But I think that success would probably be more likely by motivating those who, up to this point, don't care much about this, rather than convince NRA members to change their views.