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.
I believe you are correct, Nancy sees that her days as numbered. I believe that she thought her four problem children were going to help the cause but they quickly got out of control.