Even if you don't own a gun, if their beliefs become mainstream and accepted by the government, you can still be subjected to their idiocy and hoplophobia:
That is the problem with the gun controller/banner mentality. It is ultimately rooted in Authoritarianism. Therefore, it is a threat to all rights: Your right to privacy. Your right to free spech. Your right of due process.
Let this incident be a warning to those who are apathetic towards the 2nd Amendment. You can't afford to sit this fight out. It doesn't matter whether you own a gun or not. It will eventually affect you. We're seeing the genesis of this with our own Zero Tolerance policies. (In New Jersey, unsurprisingly)