Worse than not understanding the 2nd, as if that wasn’t bad enough, he doesn’t understand self defense.
I saw some research a few years back but I do not have a link for it that showed that the bad guys fired on average less than 3 shots. That’s because they usually had the drop on their target and the target couldn’t return fire.
OTOH, the good guy when he had a chance to return fire would use on average about 8 rounds to end the threat.
Cops often unload an entire magazine of 40 caliber ammo, and then continue trying to pull the trigger on their glock after it locks back when empty.