Should Catholics and Protestants have a group hug?

Hans Kung, in his doctoral thesis "Justification: The Doctrine of Karl Barth and a Catholic Reflection", proposed that the Protestant Karl Barth was in 'fundamental agreement' with the Catholic teaching on the issue of Justification.

Essentially, he's saying: Why are we all arguing? Protestants and Catholics have overdone the differences between us just in order to keep a difference between us. Why not recognise that we're more similar than we think and just get along?

To be continued... chatting with my wifey. Sorry to keep you in suspense.