A 12 year old black girl just called me a Nazi

I'm mostly white, like 75% white, and my dad was black. I was just walking with my friend and she was like "oh you're a Nazi huh?" I was like wtf I'm black, literally partially black. It's so annoying, I don't even like Trump that much and I'm not racist towards blacks at all. I just wish I could get a good job and not be judged for the color of my skin. Why are people like this, is it the education system, the media. I really can't tell anymore.