From my vantage point there was a lot of contact on both sides of the floor and in the first half MSU got all of the calls, where they should have only gotten some of the calls. That stuff always makes me mad - even when NU gets (rarely, but it happens) the special treatment. But I might be wrong and I missed a foul call late in the first half. The first one I really noticed was when their big backhanded Benson out of his way.
But the 70% and 75% were truly the killers, and a lot of those shots were guarded and contested in the first half, so I can't really fault the kids defense too much and say it was just all easy buckets. If you told me NU shot 44% and 40%, I'd expect victory rather than 20 points in the hole.