Kushner’s answers are in direct contradiction to 2000 years of Christian understanding and 3500 years of Jewish understanding.
Here’s a traditional rabbi with a traditional Jewish answer:
https://www.chabad.org/multimedia/media_cdo/aid/300707/jewish/Bad-Things-to-Good-People.htm
I’m a bit skeptical if assertions come across as pat answers to complex issues. Interesting points. Yet, it rains on the just and the unjust.