A group of white civil rights activists sits down to have a meal and they're attacked by left wing terrorists.
Instead of interviewing any of the activists the mainstream media (msm) interviews a third party who smears the victims by calling them "white supremacists," whatever that is.
The term "white supremacist" is used as a pejortative by the msm and anti-white racists.
The use of "white supremacist" is a way of giving a biased opinion about an organization or individual in an ostensibly unbiased way. The term is never defined so the reader cannot compare the definition with the actual group or person being labeled, if the reader even thinks about it at all.
Note that the msm did not talk to the leftist terrorists or the white civil rights activists about the situation, they talked to a biased, uninvolved third party.
If the msm reported the views of the leftist terrorists the readers would realize how evil and insane they really are. If they reported the views of the white civil rights activists the readers would realize that they're right.
So the msm continues to report the news in a biased manner and withholds information from the reader. The msm is profoundly anti-white.