By observation it seems, that very simple, binary models - Team A v Team B ...appeals to aspects of human psychology. -- I think we can reason our way beyond this, though that takes time, attention, quality input, and intention.

I am typically suspicious of the quick adoption of any idea or movement with an 'Only 2 Options' energy. Powerful exploitation of psychology possible, to less than desirous effect.

- - -

"I held it truth, with him who sings

To one clear harp in divers tones,

That men may rise on stepping-stones

Of their dead selves to higher things."

Excerpt from 'In Memoriam A. H. H.' - Alfred, Lord Tennyson