"When collective hate organizes and gets industrialized, then genocide follows," said Spielberg. "We have to take it more seriously today than I think we have had to take it in a generation," he said during a time of heightened identity politics and the massacre of 11 people at the Tree of Life synagogue in which the suspected shooter left a trail of anti-Semitic posts online.

Spielberg, 25 years after 'Schindler's List,' warns against collective hate NBC News