One person does not a society make.
We've changed, as a society, when it comes to firearms. When this country was founded, the head of the household was required, by law, to have a firearm, and a certain amount of ammunition. Over the years we've become a more violent society and it seems related to the amount of gun control, associated with the increase in anti-gun efforts. Which came first?
I think, when we know our neighbor or the person we're shopping next to is openly carrying, or may be concealed carrying, then we will all become more polite.
That was not "the head of every household" it was every male between the ages of 18-45. Well eventually, at first I seem to remember the requirement was for white only, but that might be wrong.