"Who brought the slaves here and sold them in the south???"
Why it was staid Bostonians, along with other pious and proper hypocritical New Englanders. The shipping magnates of New England plied the seas running slaves, when that collapsed they entered into the opium trade of China and California.
John F. Kerry's Grandfather was an opium dealer and dope runner who amassed the Forbes family fortune that Johnny boy still derives filthy lucre from.
Care to address the other question????