Just a minor pet peeve

So it bugs me when people refer to anyone that isn't white as a POC. Black isn't a color it's the absence of light and white is all the light. Plus aren't we all supposed to be united? So why do we all have to separate one group because of what their ancestors did and a few dumb asses think? Most people that are white aren't a dumb piece of shit it's just those people that get the spotlight....