That didn't happen. <-- Removing slavery from history lessons. And if it did, it wasn't that bad. <-- We are now here.
And if it was, that's not a big deal.
And if it is, that's not my fault.
And if it was, I didn't mean it.
And if I did, you deserved it.
I'd say various conservative factions are at each of the first 4 steps (step three: claiming systemic racism doesn't exist, step four: "why should I be held responsible for something that my ancestors did?")