I don't have to show "jack"...
If you want your claim that your tighter gun control led to reduced crime to stand, then you most certainly do.
Especially to people that don't accept anything but their own opinions even when They are shown facts.
Ironic statement, given that you're expressing your opinion and don't have any fact to back it up.
Show causatuion, or admot you cannot.
First thing you'll need to do is show that crime dropped - how much and over what period.
Next, you'll need to describe the change in NY gun laws, prior to the onset of that drop in crime, that supposedly precipitaed said drop in crime.