And this is not something we want to hear. It means that we, too, are responsible for our communal sins, even if we as individuals haven’t committed them.
Responsibility is a huge theme in our culture. It's an essential part of the script we're given. Everyone is responsible for his or her own actions, choices, and life.
But unfortunately, today is Ash Wednesday, a day that reminds us that not only are we literally dust of the ground, fated to return to that same dust when we die, but in the grand scheme of things we are less than a speck of dust compared to the universe.