Edit January 19: FLI has made a substantive statement about this issue:
https://futureoflife.org/rejection_statement/
This seems concerning. It is claimed that the Future of Life Institute, run by MIT professor Max Tegmark, offered but did not pay out a grant to a Swedish far-right foundation. The character of this foundation and its associates is well-known in Sweden. Expo is an old and respected watchdog organization specialized on neo-nazism and related movements.
https://expo.se/2023/01/elon-musk-funded-nonprofit-run-mit-professor-offered-finance-swedish-pro-nazi-group
I don't know about Sweden, but it takes a lot more than being "a bit more sensationalized and extreme than something like the Washington Examiner or NY Post" to get your access to banking cut off in most liberal democracies. The content they posted with an imminent threat of a banking cutoff may not be representative of their historic content.
The FLI activity started several months before the alleged bank freeze. For the "grant" to be motivated by the bank threat, one would need to conclude that ND knew of the risk of freezing yet couldn't get a bank account anywhere . . . yet somehow they are still able to take donations via PayPal. Seems less likely they are on some sort of global or even national blacklist given that datum. So basically I don't believe their assertion of a banking blacklist against them in the first place.
If I had to guess, they were probably financially failing because they were too toxic for ad networks or for other reasons.