Robert Kiyosaki: "You put labels on people, they die". I think apart from his emotional reaction Robert is spot on.
One of the easiest ways to enslave people mentally is done with the language construct "xx is a (nominalization) ".
This is because those nominalizations can be redefined so easily with propaganda. And this way of propaganda is done daily in the media. To the point where people believing in the changed definitions of those labels start killing.
You can find out more on nominalizations from Noam Chomsky and people who learned from him.
My answer is not about his emotional reaction, it is about the point he made.