DeAnna
Just A Face in The Crowd
More specifically, it was that D'Antoni had so little interest in defense that he didn't even recognize what the Suns needed in order to play it reasonably well.
Why do people keep repeating this? It's not that he had little interest in defense - obviously DA knew his personnel and how to mask their deficiencies.
If you read the book SSOL, he was always talking about their defense but knew he didn't have the horses.