I mean, racism has as much reason to exist now as it ever did. "I'll protect me and what's mine" has been the dividing line between species for thousands of years, and we have to choose whether we'll continue it. A "Kill or be killed" mindset might keep you safe, but you'll never know if the person you killed did indeed mean you harm, or if you could've instead lived without killing, and broke bread with a rival. The logic still applies