It could be that the English concept "community" is subtly different from Finnish "yhteisö". Another way to state this could be that as a community grows large

It could be that the English concept "community" is subtly different from Finnish "yhteisö". Another way to state this could be that as a community grows larger, the shared norms become weaker. Large communities often have subcommunities that believe that their norms are more universal within the community than they actually are. Ugly things tend to happen when two such subcommunities collide.