“Just not by us directly” is doing a lot of heavy lifting here. What the fuck is this “us” shit? I didn’t choose to enslave anyone and I have no power to free them. Equivocating being forced to participate in capitalism with directly owning a my own fucking plantation is just mystifying history - just edgy nihilism.
The Founders were among history’s monsters and you need to stop trying to protect their legacy by painting us with their brush. Chattel slavery was a uniquely horrible institution and its end mattered.