The slavers that brought them to Mass. - what were their names? What was their worldview? Did they claim to be Christians - what is the evidence for this? Got any? If they did claim to be Christians, does that mean that they really were? If they werer or weren't does that inculpate all the inhabitants of New England? You have not made a case - you make it and then I'll respond.
I know about Jackson (he was an ancestor of mine.) I find it sad that he fought to preserve slavery. There have been many good people with glaring flaws; Jackson was one.
I find it sad that you don't understand the thinking of your own ancestor. In his own words, he did not fight for slavery. Who is right about Jackson? You or Jackson? All men are flawed pal, but Jackson was one of the best.