There is a big difference between cutting off financial services for organizations and people; in general, in business-to-business relations organizations are free to serve only whom they wish, but individuals (unlike organizations) deserve protection from discrimination, and having access to core banking services is considered an important right for individuals in EU.
Dutch banks denying accounts to someone because they are a conspiracy nut would be big news; even someone who's declared bankruptcy and is currently sitting in jail after being convicted for fraud would have the right to a basic bank account.
Because your quote in the post above is literally a lie due to omission of that key word - no, dutch banks did not terminate the accounts of any Corona-critics / anti-vax'ers / conspiracy nuts (the obvious/natural reading of that sentence implies they blocked accounts of people like that), they just terminated accounts of some organizations. As currently written, that quote asserts that banks not only hold power over orgs but also hold equivalent power over "undesirable" people, which is not true and would be very worrying (and relevant to this discussion) if true, so I feel that I must contest that misleading quote.
Dutch banks denying accounts to someone because they are a conspiracy nut would be big news; even someone who's declared bankruptcy and is currently sitting in jail after being convicted for fraud would have the right to a basic bank account.