Why is historical distortion immoral/unethical

/in /by

Why is historical distortion immoral/unethical ?  The criteria in this assessment are adequacy and logical organization of your thoughts/ideas. First: the Principle of Equal Liberty  each person is to have an equal right to the most extensive basic liberty compatible with a similar liberty for others.
Second: The Difference Principle  social and economic inequalities are just only if they result in compensating benefits, particularly for the least advantage in society.