I mean, while he is perfectly correct in this quote, this is the President that instituted genocidal policies against Native Americans, so I wouldn't rely on him for most moral judgements. "Broken Clocks…" and all that.

You're going to be hard pressed to find literally anyone in the majority of human history who has morals that perfectly line up with those of 21st century America.

The argument that "This guy did bad stuff, therefore his opinions on everything are completely invalid" has to be one of my least favorite tropes of modern thinking.