The definition as being relayed from the article doesn’t meet any of the classical narcissism definitions so I think you’re right. Someone awhile ago came up with a cool name for a new definition of something (‘group narcissism’), and since calling people you don’t like narcissist seems en Vogue this year, here we are.

Also, narcissism - as in the actually identifiable pathology, has a number of falsifiable elements (as much as one can get in psychology anyway, which isn’t much) which this theory doesn’t really have.

So it’s basically horoscoping.

Also, good luck trying to clearly define society wide pathology in a credible way.