Quiet understandably you don't expect any conventional banker to support the Bitcoin idea. The blockchain technology is really taking away their jobs and making a mockery of the whole banking system. Dimon isn't saying anything strange to the public. Whether he admits it publicly or not, we obviously know that he (and his ilks) is threatened by Bitcoin.
The first comments he made sounded more antagonistic but this round of comments came off a lot more defensive to me because he knows Bitcoin is making a fool out of him.