People who believe Americans own "too many guns" are usually the same people who believe the Covid lockdowns "saved millions of lives". It isn't a coincidence.
You really can't communicate with people that stupid (or brainwashed). The best you can accomplish is to point it out to observers.
And, isn't it strange how these beliefs cluster together? You already know which other baseless beliefs such a person is highly likely to hold. They are all symptoms of a political disease: Leftism.
The political disease of Rightism has its own cluster of symptoms; you know what they are.
Of course, one lone symptom isn't enough for a diagnosis, but if you get two or more, you can extrapolate to know what the problem is with stunning accuracy. It works nearly every time.
On the other hand, maybe the Rightism and Leftism are only symptoms of the disease of Statism; each with its own cluster of sub-symptoms.
Self-responsibility is the cure, but it looks unappealing to the chronically ill sufferers who would benefit the most from a big dose.
Toss a few cents my way.