I think Signal is the best. The flaws you mentioned are valid for some threat models, but now when organizing a protest.

Signal has phone number privacy, so goverment can not link any accounts to any phone numbers. At most they will know you registered Signal.

Yes, it’s centralized, but if the only threat actor you worry about is your goverment, then Signal will do just fine. They can not hand over any meaningful data on anyone because of metadata protection.

Briar?

I think Hyphanet is the closest you can get to federated hosting provider/Internet

There can be no federated browser though, since browser is just an app installed locally on your device which renders hypertext (HTML, CSS, JS and other tech) on your screen

The question was whether you are sure that only fascists marsh on capitals

They do not ship updates as fast as official Signal client does. Do not use it unless you specifically need one of its security features

You haven’t answered the question

He marshalled an attack on the capital. No non-fascist does that.

uh, you sure about that?