Back in the early days banks were likely assuming that people would abandon Bitcoin and everything related to crypto, but now the adoption is increasing significantly, and that in a very short period of time, they finally start to take it serious. And yes, blackmailing Bitcoin won't work anymore -- they are too late for that. Ultimately, we shouldn't be surprised to see them act like this, because they very well understand that Bitcoin has the potential to disrupt their entire way of operating. Let them talk as much as they want, their words hold no actual value since we know it comes from their desperation.
That is what we called “overconfidence”. They literally ignore something that have the big potential to hurt them and that time/year is 2017. It was well known to the community those CEO’s of major banks are criticising cryptocurrency but instead of decreasing its price, it rapidly increases that is not highly expected on they’re behalf. In this kind of war between two system, banking and blockchain the winner will always be the one supported by the people.