Maybe it's because the opponent (Purdue, MSU, Wisconsin, Illinois) is allowed to play rugby. Watch off the ball and see the muggings Joe W and CJF take. It's literally criminal. If it happened on the street, assault charges would be filed. And some people wonder why the Hawkeyes take exception to it.
Sure, like Fran said last night, the only option is to play through it, BUT playing through it is all but impossible. That's why they have this thing called a "foul." It's supposed to STOP all that physical BS. But not in the Big Ten.
BTW: I wonder how good Dosunmu would be if he were called for that stiff arm clear out he uses constantly. Anytime a defender gets near him, he shoves them away better than most running backs I've seen lately. Then, with four or five feet of space, he fires away. Can you imagine CJF or Joe W clearing space like that and getting away with it for 40 minutes without ONE SINGLE FOUL being called? Neither can I, but watch the video and you'll see that's exactly what Dosunmu did last night.