The classic statement on polarization comes from Christ: 'He that is not with me is against me.' (Luke 11:23) He allowed no middle ground to the moneychangers in the Temple. One acts decisively only in the conviction that all the angels are on one side and all the devils on the other.
Saul Alinsky (2016). “Thirteen Tactics for Realistic Radicals: from Rules for Radicals”, p.10, Vintage