To what extent can ethnocentrism be considered a normal reaction, and when could it become destructive and unproductive? Provide examples to support your answer.

Business Communications Assignment 3
It is quite natural to favor one’s own country over a foreign one.
To what extent can ethnocentrism be considered a normal reaction, and when could it become destructive and unproductive? Provide examples to support your answer.
Link to text: https://b-ok.cc/book/5010449/cc48fc