The cross reveals our problem: we're addicted to blaming others. The spirit of scapegoating doesn't care who's right or wrong. It's only desire is to redistribute hate, and keep finger-pointing alive.
The cross also reveals our remedy: He took our blame to end all blaming. He took the worst the world's powers could dish out, only to respond with forgiveness.
Taking up our cross is the way we become the remedy for the world.