Imagine believing racism is remotely close to as old as class structure.
We've been oppressing lower status and lesser resource people longer than we've known of other races.
My guy racism has technically be going on since the homo sapien vs erectus. I know it's technically species, but whatever. The point is people have been hating people that look different since mankind began.
Yeah, the root of racism is actually probably a lot older than classism at least in regard to money. But class structure and racism are both deeply rooted in animals. The fear of something for someone that's different and different classes of people are both as old as society is