DMC
That one GNSF guy from way above is an idiot, but I have to disagree with you here on a few things.
First of all, think about it this way. In 2007, the Mavs were on a revenge tour after the heartbreaking Finals loss from the year prior, and were absolutely dominant against literally every team in the NBA except for the We Believe Warriors. In most simulations, they would have drawn a different team in the first round (like the Nuggets, Lakers or Clippers) and swept them, beat the Jazz in 5 in the second round, beat the Spurs in 5/6 in the WCF and won the Finals over the Cavs pretty convincingly. Unfortunately for the Mavs, they ran into literally the one team out of 29 that could possibly beat them that year: the dreaded We Believe Warriors. And so the Mavs suffered an untimely death at the hands of their one kryptonite, and the Spurs were able to cruise against the Jazz and Cavs to an easy le after getting past the Suns that year. Does that mean that the Spurs should be stripped of that le or be given an asterick simply because they didn't play the best team/the team that would definitely have beaten them? No. But it's undeniable that the Mavs were the class of the league in 2007.
Secondly, I don't consider the present-day Warriors a top 5 defense, at all. I'd rank them as middling on that end despite their high analytical D-rating. What D-rating doesn't take into account is that it sort of plays off the offense of a team,
and that's how the Suns would consistently be ranked high in D-rating despite the fact they were bad on that end. The reason the Warriors have a high D-rating is their offense; as they are constantly running and scoring quickly, other teams find themselves down double digits quickly even with their average level of offense and they quickly become psychologically demoralized and resort to jacking up bad shots to try to get back in the game quickly, but that's a losing strategy against the Warriors (though teams, especially young teams, will do it anyway because it's a natural mechanism to want to match a team like that quickly to save face). That mainly explains why the Warriors' opponents shoot the lowest from 3-point territory;
this is primarily due to the fact that opponents take more ill-advised jumpers (that usually result in bricks and transition scores the other way) against the Warriors than against any other team because they're simply trying and failing to shoot themselves back in the game quickly.