lorabe
There is nothing wrong with making, let's say, a licence that prohibits the use of its adhered product for activities such as the development of nuclear weapons.
Having that said, enforcing the AGPL rules is an activity that should be done regardless of your political ideas, if someone is violating the AGPL3 the projects have every right to ask them to comply, especially when the offenders belong to powerfull corporate groups that do have the money and the resources.
Mastodon saying "we don't like them" is an expression of honesty IMO, but not the only reason to why they want to seek legal counseling.
Having that said, nazism and republican conservatism are surprisingly different, say, nazis are anti jews, conservatives are anti mexicans. Again, there is a common ground.