Nostr isn't all bitcoin holders. Nostr is predominantly bitcointwitter expats. And bitcointwitter is by and large libertarian.
Discussion
I would Bitcoin is the primary dominating ideology of Nostr, though there are Monero users, which in all honesty are basically Bitcoiners too.
We'll see how Nostr's political scene evolves, I imagine it'll probably be bridge wars of Mastodon vs Nostr if any political activity happens.
Too early to tell but I hope to imagine discussions can be better on here.