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
It is not uncommon, and I will even say usual, that Nazi sympathisers are at least somewhat subtle about it.
This is not particularly subtle. Here's their section on the Holocaust: https://nyadagbladet.se/tag/forintelsen/
Here's an editorial written for Holocaust Remembrance Day. Their central claim is that the way to prevent antisemitism it to stop "lying" about how many Jews were killed. https://nyadagbladet.se/ledare/sa-forebygger-vi-den-verkliga-antisemitismen/
This is very classic Holocaust denialism. I don't think it's unreasonable to call a website that actively promotes ethnonationalism and Holocaust denialism "pro-Nazi", unless you think that the literal words "pro-Nazi" must appear somewhere in order to qualify.