Fr Zuhlsdorf has a post on Pope Benedict XVI being the Pope of Christian unity.
. . .
Pope Benedict has been struggling against forces within his own fold to achieve Christian unity.
His is decidedly not the unity that liberals (Richard McBrien, Gerald O’Collins) have in mind when they think of Christian unity, with its watered-down version of Roman primacy, liturgy, catechesis, sexual ethics and church discipline. In other words, a Christian unity without a Christian identity (christian with a small ‘c’).
No, Benedict’s unity is real unity, true unity that costs something, that stretches people, but that does not compromise what is essential to the Church.
This is not Rahner’s “world church” where anything and anyone goes. It is the One, Holy, Catholic and Apostolic Church founded by Christ Jesus.
Benedict’s true ecumenism is consonant with everything we are as a Church.
People are going to be stretched, but absolutely nothing essential will be given away. . . .