It's a well known white supremacist theory. Notice they never say white people needed help building stuff. It's always the colored people that couldn't have possibly built all their large architecture. Andrew Jackson even used it as an excuse to justify the trail of tears saying they couldn't have possibly built all those mounds across North America and said they had murdered the superior race that constructed them
My dude knows what's up.
---The force is my ally
"If you are tired of fear from links... Let Kirby's Nightmare protect you."