The threat to you is just a hypothetical one—that you may someday no longer be able to decide who lives and who dies.
The threat to everyone else is the one you are creating, with the actual massacre weapon you are holding in your actual hands.
It strikes me that these are things that you can really only believe in a world if you have convinced yourself that other people are not actually people.
And that's how everyone recognizes that you are a gun supremacist.