Just my thoughts, but I think many marginalized/minority people "harp" on ancestory/history more than white folk because our history in America and lands affected by European Americans, are filled with tragedy. We're still trying to get over this shit while it seems a good number of white Americans are enjoying most of the fruits of an America built on our suffering. Simple analogy, It's easy for me to tell a dude whose nose I broke and shit I took to get over it...Not so easy for him.