I wouldn't be that harsh.
I don't know that person but apparently she's a Brit now living in the US (or visiting for a whole) and she's obviously having a cultural shock when it comes to guns.
It's just the way she was raised and taught.
It's the UK guns are a symbol of violence and danger, not safety and freedom as they are in the US.
Most UK cops are not even trusted with handguns and your average citizen cannot own one.
Many people in the UK have never seen a gun that close, not even on a police officer's belt.
And of course never held one and yet alone shot one.
You should feel privileged (and you are) to be accustomed to the sight of a firearm and to have the right to own guns.
She's afraid there might be a gun fight just because she sees a gun.
She's afraid someone might grab that gun at start shooting people.
She even thinks she's the one who could grab the gun (that part is cute).
I wouldn't blame her for not having been raised the way you were raised.
You shouldn't wish to have her go back to her country but instead giver her time to familiarize with her new found freedom.
In a few years she might write "America you have a solution" while she's posting picture of herself proudly carrying a gun in a coffee shop.
I'd be even harsher, but this is INGO.
The last thing we need in this country is more sheep who are programmed from birth to rely on the nanny state for their security. If she really misses the UK that much, there is an easy solution waiting for her at the nearest airport. Things didn't turn out so well for the last Brits who thought America "had a problem."
The likelihood of this latte-sipping hag suddenly appreciating the 2nd Amendment is about the same as the UN doing anything about North Korea.