KenPom has ISU's schedule #1 in terms of Opponent AdjD. The Big 12 has the best 3 pt shooting team in the country too so that probably has something to do with 3pt Defense
Hey, IM just going by stats, man. And I dont know what total D has to do with 3pt shooting, like 3 pt D would. Whatever though, go find some obscure stat, skew it in your way, then make another baseless claim. I also find it hard to believe that Buddy (and OK) would cuase an entire conference to tank in the 3 pt D (not saying they do, but that was essentially your claim)