1 individual doesn't mean a whole race.
It's not always a racist term, but the way you are using it is out of hate, so that makes it racist.

Someone could say, "Eppa gringo/whitey, I need your help with something." (Shouldn't be said, either way) Not really out of hate, but when you are saying, "Unintelligent, cringey, gringo pig." that's clearly out of hate, making it racist.

It's the same logic if someone said, "I don't see how wetback is racist, it means back cross river."