It’s clear that you’re a reasonable person. You’re putting thought into your positions. We disagree, but I can at least debate with you in a way where I feel as though we understand each other intellectually. I think you’re trying to advocate what you feel is best - and if new information or lines of thought arise, you can adjust.
But most gun control advocates aren’t like this. They know, they just know, on an emotional level that guns are evil and if only us dumb savages were forced to give them up, society would be a much better place and we’d see the error in our ways.
Their primary motivators are emotional. And so they appeal to the emotion of others. Their arguments stem not from data or reason but from anecdotes and emotional appeals. More importantly, they aren’t concerned with rationally analyzing the best path, balancing rights and societal costs. They just want to reach their end goal using any tactic they can.
The problem for gun advocates then becomes - do you compromise with someone who believes in the elimination of something you consider a fundamental natural right? This relationship works almost exclusively one way - guns become more and more restricted over time. After every round of “compromise”, you give something up and get nothing in return - every round leaves you closer to what they want.
Sarah Brady has stated straight out that it is their goal to push any ban or restriction they can manage the political clout to pass in the eventual goal of pecking gun rights to death. Slippery slope is not a fallacy when the most well funded organization working against you has stated that this is their very tactic.
There aren’t really analogous situations with other fundamental freedoms out there. There aren’t really any serious well funded groups that are dedicated to the elimination of free speech, for instance. But if there were - they might do things like, for instance, not letting a neo-nazi book be published. They could muster up some support from the public because some people will agree with their cause. And yet the ACLU and other defenders of free speech will rightfully oppose this. And proponents of an anti-free speech organization might view these people similar to the way you view gun advocates - so extreme that they’d defend even a neo-nazi’s book! But it’s the principle of the thing - infringement of freedoms even when they’re distasteful is still an attack on that freedom, and can lead to further attacks.
Gun rights advocates feel a fundamnetal human right is under assault and they’ll fight tooth and nail for it. Anyone pushing for that agenda should be viewed with skepticism as to their motivations, and the larger implications of such a decision should be analyzed.
I don’t doubt that there’s some happy middle ground that you’d be willing to reach where you logically viewed the rights vs costs issue to be in balance. But you are in the very small minority of advocates of gun control.

