Meanings of mass psychosis in English

I think it's more a mass psychosis people have.

It's a mass psychosis, an unprintable mob panic.

He said " mass psychosis" took hold when Europeans became scared of the wave of migrants.

I said those were different things, and she strongly insisted they weren't at all different, that all forms of mass psychosis had the same roots.

'It's not the work that bothers me, it's the mass psychosis of a building filled with deranged, homicidal maniacs.'