I think you miss the point of history and cultural legacies.
I'm not making the argument that genocidal violence is in the genetic markup of white folks.
White folks is broadly speaking "European-descended people".
I think this group of people is... Special in this regard. Most likely due to infighting and a long history of savagery - not due to their DNA!
So... Other peoples won't necessarily have this brutal background, and so would not necessarily have done what white folks did.
I think owning up to the uniqueness of what it means to be white, or European-descendant, is an interesting project. And that project should not be tossed aside by some rationalisation that, incidentally, is terribly convenient for.. white folks.
I suppose our second worst problem will be ourselves, reacting in our various ways to that worst problem.