If your point is that the US didn't invent racism, I agree. Again, read Kendi, who traces its roots back pretty well. But that doesn't mean the US wasn't hugely racist both during its colonial period and long after. And again, if that's something that you can't see, I'm not sure what the point of further discussion is.
Many people were involved in this system, from the warring tribes in Africa selling prisoners, to countries like the UK setting up colonies with slaves for cotton, tobacco, etc.
We were the colony that finally stopped the system. It took a long time and a lot of blood because it was the system, but it was ended.