White America sees slavery of African people as “that thing that caused the Civil War” and nothing more. Certainly not as the unspeakably evil foundation of the present society that it is (along with indigenous genocide and theft of the land, of course).
The worst is when whites are like “well askshully slavery has always existed everywhere (which is, of course, not even close to being accurate) it’s us white Americans who first ended slavery. So…. you’re welcome.”