Why is the firearms issue being treated as a zero sum game?

[GoCubsGo]

14. The gun cult believes that chipping away at their ability to have

unfettered access to guns will eventually lead to losing all access. They look at it as a domino effect, where background checks lead red flag laws, lead to an assault weapons ban, which leads to the ban of some other weapon, then to another, and another, until all guns are banned and the Second Amendment is repealed. This is why they dig in to fight off every attempt at gun control, and the rest of us are left with nothing. They, of course, own half the Senate, where any common sense gun legislation goes to die.