Thanks for the thoughtful comment. I really appreciate it.
I think you're right that the strongest argument against state gun control is pointing out that the USA is the biggest perpetrator of organised terrorism in world history
Actually I don't even view this as the primary argument against "gun control," though yes, it is definitely something most people seem not to consider.
In my view, the strongest argument against forcibly disarming individuals is the immutable and objective reality of nature-conferred individual self-ownership. Every individual has a natural right to procure and secure self-defensive means for themselves.