With respect to the movie, 'Peaceful Warrior' has a deeper meaning. It refers to a way of the warrior where one is calm, free of all the unwanted thoughts that are about the past or future and therefore being completely in the present.
I think this may be the answer:
... That they'll be a little nicer to each other, especially in
family settings, since there's a lot of pressure in those
relationships. But to begin with, I guess I wanted to tell the natives
of the province of Dalecarlia a thing or two as well. Half of my
family comes from Dalecarlia, from ...