More conspiratorial theories say bitcoin's destiny is to replace banks, and banks fear the competition
We can't say if banks are scared of bitcoins or not, but you know what, they should be
These financial institutions are either really worried about their future ahead and don't want bitcoin involved at all, or they are greedy thinking they will soon develop similar technology and force people to adapt, making much more profit. Or otherwise, they are just suspicious and a little anxious to let bitcoin be so involved with their citizens, because they don't want criminals which can't be tracked.