Perhaps I’m wrong. In case I am then please explain how all of your solutions do nothing but restrict the rights of the law abiding and do nothing to address the actual problems which are a failure to enforce existing laws and get the mentally ill properly identified and adjudicated?
If you want to create a mass casualty event explosives are the means of choice.
Around the world where firearms access is the most limited explosives are absolutely the means of choice for mass casualty events.
Simply review a list of Terrorist Attacks around the world and look at where bombings are the most common and look at how limited access is to firearms in those countries.
As for “causation” we have over 300 million firearms in the US currently in civilian hands and yet our violent crime rate has been cut by half since it peaked in the 90’s. During the same time lawful carry has expanded from just 8 states to all fifty so today we have in excess of 20 million people lawfully carrying going about their daily lives at any given time in the US not bothering anyone so obviously access to firearms is not causative.