well, it is a common set of beliefs that Catholics and Lutherans share -- we are more alike than not. We have differences of course, but when redgolum and others took the time to explain to me the Lutheran belief in the True Presence in the Eucharist, in the common belief we both have in Baptism for the remission of sins and in the Sacrament of Penance (yes, the LCMS does hold this -- but I understand it is not that common) -- when I was told about this by caring and devout Lutherans, we do come to the conclusion that we may argue-even heated arguments, but as Christian brethern we ought not to fight.
The Lutherans/Anglican communions are far closer to us in the Catholic/Orthodox belief