Sure. I'll meet you halfway and say it's cultural attitude, but only when combined with the exceedingly high standards of making the change. With circumcision, there is nothing preventing legislation, at the state level or the federal level, other than a simple majority.

With firearms, neither state, nor federal government, can pass restrictions. It would get shot down in the court system. Now, before going too far down this rabbit hole, we should be on the same page with what I mean by saying gun culture is no longer what is restricting legislation. When I say most people are in favor in legislative change, I am talking about what Americans call sensible changes, not an outright ban.

You are right in that the cultural aspect would prevent a mandatory buyback followed by a restricted class scheduling of firearms, such as what happened in Australia. But there are changes that the vast majority would be okay with that would reduce school shootings. Changes that you would think would already be in place, like secure storage, more reasonable age restrictions, stronger background checks, a cool down period, magazine restrictions, safety courses, etc. etc.. These are the type of changes that you see individual states try to pass and is part of the frustration, as the laws get struck down.

The problem comes in that in order to make those changes, you'd first have to change the constitution. But once you change the constitution, the guarantee of sensible legislation is out the window. Because of that, there is a fear that it would be the first step down a slippery slope.

Now, you brought up how America was founded by superior firepower. And I brought up how things are now. But to throw another wrench into things, let's jump back a few decades and I'll tell you what I have personally seen and give you another anecdotal aspect.

Texas is renowned for it's gun culture. We have Hollywood to thank for this. I'm sure there were probably mass shootings before this, but the earliest that I know of happened in 1966 in Austin. A gunman ascended the clock tower at the University of Texas with a long rifle and killed a dozen or so people while injuring many more. This brought about the first real gun control laws. Texas had, for all intents, banned carrying handguns immediately after this event. A couple years later, the Gun Control Act passed in Congress. It was something that both parties got behind and it went mostly without bitching and moaning. It wasn't until another shooting, also in Texas, in the early 90s that this started to change. The shooting took place at a restaurant, and one of the patrons provided a tear filled testimony to congress, about how if only they had access to their pistol, they could have stopped it. After this, the law changed again, and handguns were allowed. It was only concealed carry, you had to attend a class, take a proficiency test, and be finger printed, but you could carry again. But now, they've recently changed it once more. You can open and conceal carry, and you can do it without any type of course work. If you buy from a private seller, you don't even need a background check.

That is why I say the problem isn't the gun culture. There was a brief period in time where people understood the problem and wanted to fix it. The problem is the batshit crazy political theatre and purposeful agitation between our two political parties. That is also why I get frustrated when I see people shoehorning gun control into unrelated topics. It fuels that polarization between the parties without adding anything of merit to the discussion.