Answer:
It could be based on how those historians learned the subject. Textbooks though we trust can easily have false information. So, for example a Northern textbook could say that millions of slaves were brought to the U.S. while a Southern textbook could say they brought millions of "workers"
Explanation:
Alsoooo based on what the historical event is like if it can be interpreted differently it could be basically because everyone has different opinions. So one might see something as an insult while the other might see at a joke.
