Not everyone hates their disciplinarian. Manny is a smart kid (Academic All Big Ten, I think), so hopefully he knows that discipline is a good thing when wielded wisely. Beilein really looks out for these kids' best interests, and I'm sure he is very careful when taking action like this. I think Manny is smart enough to know that (a) it's a great idea to get your degree; (b) Beilein genuinely cares about him; and (c) his game isn't 1st round quality yet.
I have a sneaking suspicion Manny will be back next year.