Your argument doesn't work if the majority of slave owners and sellers and distributors were Jews. Your argument doesn't work in white countries that were never involved in slavery or colonialism. Your argument doesn't consider white slaves (slavic people, Barbary pirate slave trade, arab slave trade of Iberian whites). Your argument doesn't consider non white slave owners (i.e. slavery all over the world). Your argument doesn't consider modern slavery (much of it rebooted after Hilary took out Ghaddafi). Your argument doesn't consider other forms of slavery relevant to the neo feudalism we are living in.