As a former fraud investigator I can tell you that pretty well all banks work with "known bad actors". To think otherwise is being incredibly naive.
Money is money and most banks and bankers certainly do not see themselves as moral arbiters.
There's a recent book called "Dark Towers" that describes the history of Deutsche Bank. It was notoriously more inclined to take money from known "bad actors," including Russian gangsters, than other banks. It's well-known that it was shoveling money to Trump at a time when all American banks had slammed their doors in his face.
https://www.npr.org/2020/02/19/8071...uption-at-the-bank-that-holds-trump-s-secrets
https://www.nytimes.com/2020/02/14/...ank-david-enrich.html?searchResultPosition=10
https://www.theguardian.com/business/2020/feb/16/dark-towers-review-deutsche-bank-donald-trump
In the U.S., at least, banks have to comply with "know your customer" laws and regulations. Banks may associate with some bad actors, but they are required to at least try to avoid the worst.
