reacted in more subdued fashion, you would have argued it was a sign that he was guilty because someone who really felt wronged in this way would have been more fired up. He can't win with you.
He had to react that way to save the nomination imo, and I think that he did. But he did it for a different reason - righteous indignation. What the Dems did to him was unprecedented, and he called them out for it.