It's standard operating procedure for the lying leftist press, and has been for a long time.
I have video footage from a rally held in downtown Seattle almost 11 years ago. You'd think a bagpipe band, a couple hundred marchers, flanked by motorcycle cops, and addressed by a former state supreme court justice among others, would make it into the (local) media, but the protest was not PC, so the media were silent.
Or almost. There were maybe a dozen anti-fur protesters nearby and they did make it on-camera. (The groups overlapped -- I was told that one channel intentionally blurred out the larger group's signs, making it look like they were part of the anti-fur protest.)
Saw it happen again this year at the Seattle Rally in support of Israel. Not a peep out of the media.