Ah. The thing I thought was potentially reasonable was interpreting someone’s public post about a personal firearm arsenal and history of volatile behavior directed at you as a very low probability, high consequence risk to your health or life.
From there I think individual variation takes over, and I think a majority of people, regardless of what side of the border they’re on, would not elect to arm themselves with a gun for the purpose of engaging with someone they view as potentially violent. Low probability high consequence risk seems to be handled very differently by different people, and while I could imagine bringing a gun as one possible response to that risk, it’s not a decision I think is particularly reasonable or common regardless of national culture.
Think about it this way. I wear a riding helmet not because I plan to become a lawn dart on any given day, but because there is a very low probability risk that any given ride could result in a devastating TBI. I still choose to ride, because riding is sufficiently important to me to engage with that risk, but I mitigate it to the extent that I’m able with the helmet. My brother in law will never, ever ride a horse due to a lower motivation to ride, and a stronger aversion to the possible negative consequence. My uncle thinks riding helmets are for sissies (his words) and his unconscious risk mitigation takes the form of riding quiet stock types in relatively tranquil environments and not being willing to touch a hot mare with a ten foot pole. Different approaches to the same confoundingly improbable risk.
Reactions to a low probability risk of armed conflict will vary based on individual personalities and priorities and fears, and those are very hard to do the calculus on, especially in a situation like this where so little is known. I believe a majority of people the world over, including in the US, would probably generally not arm themselves and engage with someone they thought was unhinged and possibly armed – self preservation is a pretty strong, universal drive. But does decision-making change if you think there’s a 1% chance of harm, vs. a 0.0001% chance? Or if your motivation for face-to-face interaction is a tenant issue vs. something you perceive (rightly or wrongly) as an immediate threat to your family? There is some set of people in some set of circumstances who will bring a gun and go over, just like I wear a riding helmet and mount up. I don’t think US Americans make up the majority of that set of hypothetical actors who would react to risk that way, necessarily, because national culture is just one, fairly abstruse component that competes with things like personality and fear and purpose in conditioning a reaction.
I can’t think of a single soul who’d think bringing a gun “just in case” in this kind of situation is smart. Maybe one person I can think of would maybe consider it. Honestly. I think this could veer very easily into politics, but for several reasons most of the people I know in the US have considerable respect for the destructive power of a high velocity projectile and do not take firearms lightly.
The facts that are out there are consistent with either villainous intent or fear-driven reaction to a certain type of risk. Regardless of one’s perspective, I think it’s smarter to remain agnostic about that until more is known. But it’s your prerogative to form your own opinions.