Banks does not exactly hate Bitcoin is itself. What the banks hate is how the crypto world works and these includes how bitcoin transactions are made. But bitcoin cannot defeat a fiat currency use by banks, unless the use of bitcoin is legalize in that country. In that instance, there would really be competition on the popularity of bitcoin and the banks.
You are explaining something which is entirely contradicting on your statement. They do hate bitcoin because its just all the same when we do talk about crypto since bitcoin is the only coin in the market that do able to create such payment system which is basically affecting bank sectors in regards with payment system.
Its just normal for them to react and it is already an anticipated thing for them to do.