nihilism is tool of oppression
Like it cannot be overstated how collective change is built by a collection of small, sustained individual actions. You giving what you can to one person, you helping one person when you can, you communicating with one person, sharing with one person, everything, it all adds up. That is how we build community. Its not big and dramatic and all at once. It is mundane but continuous.
We can also see how community can be destroyed the same way. Once a destructive ideology takes hold within a few people, left alone too long, it can spread, it can slowly become a "norm" that people embrace over their community. If it's easier to fall into this ideology than it is to build community -and that is usually the case- then something seemingly trivial can bring down years of work.