I think it’s vague enough on the specifics that everything can still mesh. She says everyone’s heard Finn’s story, not necessarily that they all discussed it and agreed they should do it too. More likely, when they talked about the story they would have been afraid to openly voice any support for what he did.

So when they all put their weapons down, it was more like the instinctual feeling knowing that they would all do the same thing then and there, that it was the right thing to do, regardless of what was or wasn’t said.