You are seeing the effect of brainwashing.
The news (and social media) is continuously bombarding them with the same information.

The strength of the emotions determine how successful the brainwashing is.
So CNN makes people scared of Trump=Hitler. Or MSNBC makes people scared of Russia/Putin.
"Or people not wearing masks are spreading deadly disease!"

Fear can be used to remove logical thinking.
To avoid feeling it people will start chanting and repeat same sentences over and over again.

After fear comes anger. And that is the next phase.
So people are made angry about tests/masks. Or are made angry about police.

The following step is Hate.
So people learn to hate whites, or each other. With hate they start shooting.
And some people are now setting stuff on fire out of hate.

Then we have blind violence/ psychosis.
People just start shooting each other.
This goes easier with usage of certain drugs, in the military you may get special medicine to get this reaction.
Because no-one really wants to enter the psychotic state.

To bring people back to normal, they need to reach down to their fears again.
And slowly recover from their self-inflicted brain-washing.
What also may help is to give them weed, as it calms the mind.