Is that not where you're coming from? Because it sure sounds like that's where you're coming from.
The Sanders' quote wasn't oppressively racist, given that his whole platform was centered around equality. Im not claiming that its impossible to say something racist and oppressive about white people. Saying something like "All white people are NASCAR loving, mountain dew sucking, Trump supporting, racist, wal-mart grade white trash" would be considered racist for example.
Edit: and since you are not the person that posted the sanders quote.. im not sure how you know what they think their premise is.