Its Nancys own fault, she refused to reign in her problem children at the very beginning.
The gang of four (Cortez, Omar and the other two bozos) are controlled by revolutionaries that want to destroy the country. Nothing with the media is organic. The reason they're getting this publicity is because someone in power WANTS them to have this publicity.
Whether there was an actual blow up or not, Nancy is definitely in a snit, and Cortez is, as another poster noted, mentally unstable. Pelosi sees the writing on the wall that she's being dethroned, and she doesn't like it.