It means it doesn't matter if you're American ,Arab , Russia , African , Chinese , Japanese , Korean , German. Etc...etc...etc... Show some fucking respect to the country you are living in or visiting.
Like I said If i am visiting or living in a country like Japan I'm gonna do some Japanese shit out of respect for their country. For instance Bowing is sign a of respect should i go over there and say " fuck your countries flag and what it stands for I'm not doing this stupid shit" ?