You also oversimplify Northern racial attitudes. Some Northern states had Black Codes (as Southern states had Slave or Black Codes). Others didn't. Some Northern people were pathologically Negrophobic (as some Southerners were). Others may not have wanted to live too close to too many African-Americans (like some Whites today), but others had no problem with the Black family down the road.
That's on you. I didn't say that, but I will point out that it's as close to "free" as it was possible to get in that era.
And that using slave labor is a legitimate way to become wealthy.
It is an immoral way to become wealthy, but it was a legal way to become wealthy in that era.
I guess you wouldn't have any problem losing your job to a slave, convict or illegal immigrant.
You are trying to make it about me. It is not about me. I didn't say the northerners who hated slavery didn't have a valid gripe. What I said is they weren't motivated by concern for slaves as modern historians would have us believe.
You also oversimplify Northern racial attitudes. Some Northern states had Black Codes (as Southern states had Slave or Black Codes).
It is not remarkable to discover that Southern states were racist. What is not known among most people nowadays is how very racist were the Northern states. It undermines the illusion that they were good people doing the lord's work in stamping out slavery. They weren't. They were just ordinary people for their time, doing what the powers in Washington DC ordered them to do.
...but others had no problem with the Black family down the road.
Very small minority of the population at that time.