The "we" in Yom Kippur

Haaretz's Bradley Burston offers up a stunning Yom Kippur confession that is both personal and collective, as befits the holiday. Here is the liturgical part, which recounts a litany of sins in the first person plural:

Asham'nu - This is our confession. It is written that we will seek You out only when we admit that we have done wrong.
Bagadnu - We have betrayed You. We have made gods of stone and tile and asphalt.
Gazalnu - We have stolen, and called it reclaiming.
Dibarnu Dofi - We have learned to say one thing to the world, and something different to one other.