The way to avoid the fediverse suffering the same fate is not to combat extremism with an equivalent amount of antagonistic political dialogue, but to form meaningful communities around non-political topics.
Instead of bickering in circles about politics, join communities dedicated to your hobbies, career, etc.
My primary concern is for the fediverse to generate content that is search engine friendly. Generally, I don't think that political squabbles serve that end.
I'm doing my best to practice what I preach. Check my profile.