The teeth-gnashing about the D is a bit overreactive, imo.
The Hawks are doing what they should against inferior competition, winning handily - and hardly trying, for stretches during games.
After six games, Iowa is scoring an average of 100.5 ppg. And in that same span, they are allowing an avg of 68.5. They are winning games by an avg margin of 32 points.
Despite the "bad defense", they are still averaging NBA numbers on the offensive end and winning blowouts by twice as much more than what would be a healthy margin.
Don't care how good the opposing defense might be, Iowa's offense is too multi-faceted and elite to ever be truly "shut down".