There was always fucking hate! in 2017 every single bank was against to Bitcoin. Therefore, I was very skeptical about Bitcoin. None of the banks supported Bitcoin. There were always haters out there but Bitcoin has seen 19K ATH.
Why should the banks support something that may radically disrupt their status in charge? It's like asking why the horse seller hates carsThe only thing which makes a horse better than a car is the liability of the asset, while the bank offers you a stable currency(assuming it is a member of the established power) bitcoin offers you speed, anonymous identity, secure storage through private keys, transaction-only fees, and many other benefits...so it's a natural hate the one they do have
it is not always support it is more like adapting to new world and the changes that are happening in it so that your "business" doesn't evaporate overnight just because you refused to change.
banks will surely get on board the bitcoin wagon eventually even if they are resisting right now. not to mention that most of them are saving face because the government has banned them from getting involved with bitcoin so they are saying it is bad that they don't want to not that they want to buy they are not allowed!