So they did have slaves. That's all I needed you to acknowledge you fucking moron. Everything else is just you trying to explain why you're stupid.
Canada being a colony of the French and then the British empire puts it in a different position than America you dope. They weren't the white bootstrappers that you're trying to paint them as. They were colonialists from established empires who had some slavery. Americans industrialized slavery because they had no colonial support. They supported themselves on the brutal industrialization of someone else's labor.
That's not a rational point its simply a fantasy and I'm not trying to cancel your fantasies. I think everyone should be allowed to express themselves artistically.
The record doesn't support your cosplay, it only supports what actually happened, not what you imagine would happen under different circumstances. That's more like historical fiction ala The Man in The High Castle except dumber, like a child wrote it.