In this kind of history, all nuance (like Adams' views on slavery) is lost and all historical events are made to fit a predetermined narrative. In addition to being wrong, it's incredibly boring stuff.
As you let slip here, Horne's writings aren't about history: they're a form public of agitation so that "the USA will do less racist shit". Which would be fine if he was a social critic or a politician. But he's been passing himself off as a historian.
> Horne's writings aren't about history: they're a form public of agitation so that "the USA will do less racist shit".