This is the attitude where generally a discussion stops. If I'm not ready to change my mind, why should I enter such a discussion.
We all know that the topic here is so complex, because it includes facts and emotions. There are no simple truth. This is not two plus two.
I, for example, am pretty much convinced about my point of view on this matter. Still, I want to understand, why it is that people in the US love their guns so much that this love is stronger that they are willing to take chances.

But I heard the "I know the truth" attitude for decades. You know where? In communist East Germany. And I think Afsaneh also comes across this attitude in her everyday life...