What "third party"? There is only one party that decides how their server is run and moderated and that's the server owner.. If you want to see Nazi content, you can go visit the Nazi server, nobody is stopping you from doing that except maybe your government.. Nobody should be forced to host Nazi content on their servers against their will..

So go make that choice and host your own instance.. What gives you the right to choose how to run an instance you don't own? I could understand if you have no other choice, but you do have the choice. The code is available for free..