Yep, I've seen that video -- on the View with Hasselbeck, if I recall correctly. Beyond disturbing...but it's more than that. Just can't quite figure it out.
It's fairly simple actually. Just look, as with all things, to history.
Since the dawn of civilization, the aristocracy/royalty has bred with two gene pools. Other aristocrats, and their own. Sometimes it was to consolidate power and sometimes it was simply to avoid allowing 'undesirables', aka 'commoners', 'filthy peasants' etc., from bringing 'bad blood' or 'lesser people' into their circle.
Trump, like many who preceded him, is a product of that mindset. While he may or may not act on it, he sees nothing wrong with 'it'. What he sees as wrong is 'us'.