Bernice: According to our political philosophy, rights are God-given and cannot be abridged, except in individual cases where some have trampled the rights of others, i.e., through criminal acts.

I'm not familiar with the details of the Port Arthur Massacre so have no opinion whether it constitutes an example of the Problem-Reaction-Solution model.

But your post makes my point in the following way: the "thank god that we do not have the right to bear arms," is an example of how the people can be persuaded to demand the removal of fundamental rights, for security's sake. This can apply not only to the bearing of arms, but of other rights also.