probably because he's one of the 2 most influential nba coaches of the last 10 years, and an offensive mastermind whose system literally revolutionized the league. just a guess.
you don't think a guy with d'antoni's resume is qualified to be an assistant coach on the worst team in the association? there are LOTS of way less accomplished coaches on the league's benches.
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it is a capital mistake to theorize before one has data. insensibly one begins to twist facts to suit theories, instead of theories to suit facts. - sherlock holmes