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.
That is correct., but publicly ranting against Bitcoin isn't going to help. Then we have cases registered against him for manipulating the market while JP Morgan was buying bitcoins for its clients. The best strategy for him is to shut up, which he is trying hard to do.