Answer: I don't know who the guy is but the quote sounds like it means history cannot be bent to confrom to a certain group of people's interpretaion.
Explanation: Versions of history differ greatly depending on who you're asking since everyone "bends" it slightly adapt to their own needs or make themselves/their country look better. So by saying it cannot be bent, he is reminding us that history is history, only one thing happened, so don't trust everyone's stories that could be biased, or twisted in someway.