Of course it's sarcasm.
But in modern day america you can get called racist for literally anything. You try to discuss, you're called a racist. You have different opinion, you're racist. You disagree with the media main rhetoric? You're a racist. That's why most of americans are AFRAID to freely express their views. Just google it.
The mainstream media likes to portray blacks as victims as much as possible and whites as privileged and guilty. This is not always the case, but this is a general trend.
https://youtu.be/eadYJLZi30QIt's pretty crazy