Wait, do you see this image as the bottom row of teeth?
You're not actually serious right?
Borders are important in many ways, one might say that it is the importance of ownership of land and material things.
But it serves another purpose as the collective of that culture within those borders exists as a mindspace, a place of mentally integrity and thought.
Within this mindspace there are microcosm and interaction between people that from create the over arching culture.
To enter a culture and not to adhere to its guiding principles is to neglect the importance of the individual actions within the microcosms of mindspace.
The individual actions of the miscrocosms of ordinary people are usurped by the macrocosm of another over arching culture and creates schism among the population.
This generates a battle for culture as the new wave of thinking is not integrated slowly and trialed by the passage of time within interactions.
Therefore, we must see borders of not only physical properties of place but as spaces within the mind of the greater population of humanity.
Like different features to the personality of humanity as a whole.
To respect each Nation and its borders is critical to any logical direction of communication and cooperation.
It is through the mindspace and interaction of the general population within its microcosm that creates the culture at large.