When I see politics in software updates or documentation, nothing happens because I'm not looking to use the software for political activism. Maybe I tell my adblocker to remove the messaging, and carry on with my task.
I can engage with politics in a social context, when political messaging isn't interrupting something else I'm doing; that's a better place for activism, IMHO.
I almost always see activists using the argument that if I don't like the messaging then I'm part of the problem. Somehow I doubt that, given I don't mind messaging at all, where it's appropriate.
So, while I fully agree with your stance that banning political discourse is support for the status quo, I also think that it's reasonable to ask for it to be toned down a bit, especially when the politics and social issues of one country is basically drowning out everything else.
All that said, I'm talking mostly about HN or other community forums here. The owner of Notepad++ has the right to put whatever they want into their software, and if we're discussing that here on HN then it's an occasion where discussing politics is valid.
I mean, yeah. Most major social media services used in the West are based in the US. The single largest English as a first language population is in the United States.
Given how many users from outside the US are oft wont to opine on our state of affairs even during the good times - often without even being asked - I like to think they'll endure our discourse.