Bill - thank you but would have actually inserted the best of joint agreements.  But your point is well made.  You can see the same *ignorant* stance among some NCR catholic commenters - they don't know their theology, mis-use scripture, and rely upon a grade school rote playback of the catechism.
Suggest - http://www.usccb.org/beliefs-and-teachings/ecumenical-and-interreligious/ecumenical/lutheran/upload/Declaration_on_the_Way-for-Website.pdf 

Starting point:
Catholics and Lutherans should always begin from the perspective of unity and not from the point of view of division in order to strengthen what is held in common even though the differences are more easily seen and experienced.  (post does the opposite)

Joint Declaration
 Doctrine of Justification - Here Catholics and Lutherans demonstrated how, through sustained theological dialogues and prayer, a major doctrine once deemed to be church-dividing can
become a teaching in which we find our unity through reconciled diversity