In some instances (as with the Civil War statues) the twisting is done in the name of ensuring that no tender soul is triggered by some unpleasant historical fact. This is a noble but deeply misguided desire. It is impossible to learn anything from a history we are ignorant of. The whole truth about history must be told to prevent it from being repeated and so that society can grow from the mistakes made by our ancestors.
It would be intellectually reckless to attempt to argue that Western civilization is somehow faultless. Western civilization is not perfect. Like all civilizations Western civilization is inhabited by human beings who are by their very nature self-centered, ethically flawed and prone to self-deception (Romans 3:23, Galatians 5:18-20). Like produces like. Therefore, flawed beings are incapable of producing anything that is not also seriously flawed (Genesis 5:3, 1st Corinthians 15:22, Romans 5:12-15)
This is without question one of strangest lies to take root in the history of humanity, just because it is so stinking easy to fact check. Nonetheless, most of the world has bought into the notion that truth is self-determined. Even many Christians have hopped on this bandwagon and believe that the GOD OF THE UNIVERSE should alter His opinions regarding homosexuality, adultery, premarital sex and dozens of other issues simply because lots of people feel differently than He does about those issues.