The cross is not a sign of the church's quiet, suffering submission to the powers-that-be, but rather the church's revolutionary participation in the victory of Christ over those powers. The cross is not a symbol for general human suffering and oppression. Rather, the cross is what happens when one takes God's account of reality more seriously than Caesar's.
Unsurprisingly, a book co-authored by Hauerwas and Willimon is absurdly quotable, and opens up a whole new thought-world in a sentence or two. Expect more from Resident Aliens in the future. For instance:
Our society...is built on the presumption that the good society is that in which each person gets to be his or her own tyrant.