I've read that anger often stems from fear. That would explain why DU hardliners would react the way they are to such news; they are terrified.
There is truth in that, however it is more than that. Fear is only part of it.
They have been convinced by their leaders on the left, by the msm and more recently by big tech, and by their own ignorant hubris, that they are the majority in this country, when in fact, few things could be further from the truth.
When faced with reality, as they were by cnn and soon will be by an election, their reaction is utterly predictable:
The "scorned, jilted, insane ex" behavior comes to the surface.