Comment by lupusreal

Amazon considers an ethnicly homogenous workforce as a unionization threat. Ethnic diversity is seen as reducing the risk of unionization because diverse workers have a harder time relating to each other.

I think this partially explains why corporations are so keen on diversity. The other part is decision makers in the corporation being true believers in the virtue of diversity. These complement each other; the best people to drive cynically motivated diversity agendas are people who really do believe they're doing the right thing.