The ideological leaning of the developers means nothing on a federated network. What you care about is knowing the ideology of who runs your instance.
You can just as easily fall into a right wing echo chamber by joining the wrong instance. And one that censors any kind of pro Russia or pro China sentiment, which is equally bad, in my opinion.
Propaganda can come from both sides. Just keep your eyes open.
It's not like these old users were not fighting to protect your freedom of speech, by creating an open-source federated social network or anything. Yet you use that same freedom of speech they enabled for you against them on the same platform they created. Everyone here will fight for your right to do so, btw, but I just wanted to point that out.