Jackson owned slaves for most of his adult life. So what?
Jackson violated state law when he educated his slaves.
Born poor. Taught school. Military academy. Military experience. Not much slaveholding there.
He died before he was 40 and his last two years he was in the military.
So, we're talking about less than 10 years, maybe less than 5.
Too busy to check my library on this but Simon Legree he was not.