It was the North that introduced, and established slavery to this nation. It was they who first invested themselves by becoming slavers to a continent.
And successful they were!
To their north, the Canadian slaves were freed prior to the North's. To their south, the Confederate slaves were freed prior to the North's. Tenacious business men these yankees.
Be proud of your heritage. Honor does not require that you drag anothers heritage down to feel better about yours. On its own, the North has good reason to trumpet its practices and accomplishments. (well, maybe not its practices)
Wasn't peanut butter an invention of the North? And who doesn't like peanut butter?
Actually it was the Spanish, who were enslaving Indians in Florida years before the first English settlement.