I was going to explain why you're so stupid, but everyone beat me to it, and I don't want to be redundant because that would be redundantly redundant redundance.
Just to be clear though, you're saying that black slaves used to sing "I've Been Working On the Railroad" while they were building our railroads, right?
A simple yes or no should be sufficient enough. Though I suppose I can't stop you from going on another virtue signaling emotional tirade, rooted in your usual mental illness and idiocy.