> the current US president, who has literally said things like, "they're not humans, they're animals,"
Oh... wow. I didn't realize it had gone that far. A very poor example in that case. Here's a more crisp example:
The "white man" was, by original (and modern) definition, racist in regards to Africa, we categorically believed that "whites" were better than "blacks" - and that's not only the export of slaves to America. Things were pretty dire even within current human memory, and pockets of racists continue to thrive today (it seemed largely based on age in my experience, all of my friends weren't but many 50+ were).
Contrast that with Malema's "kill the boer" song that I'm sure many international folks have heard[1]. The underlying cause for this is hatred stems from the aforementioned historical and current racism - there is no belief that "we are better" (there is certainly a belief that "we are more deserving of our ancestral land"). Malema couldn't be a racist using the original definition of racism, but definitely is using the modern definition.
[1]: https://en.wikipedia.org/wiki/Dubul%27_ibhunu