Kyle formed the Oasis alliance with two POC very early in the game.
Kyle formed The Leftovers in response to a black woman being bullied that included three POC.
Kyle formed the After Party alliance with a POC after realizing he was at the bottom of the Leftover alliance and after Joseph spilled the beans about the Taylor/Brittany/Michael alliance.
Fresh off the Cookout alliance I can see why he might suspect an all black alliance, but throughout this game he has aligned with POC.
Michael and Brittany are maligning Kyle to save their games.