I was surprised of the tones this thread is reaching... since I hoped the Orthodox wouldn't even question about the necessity to defend one's faith.
I really find myself in agreement with what Mark of Ephesus and stashko said on this thread. I'm leaving the RCC because I believe in its heresy. We should keep in mind the concept that heretics are heretics: we should'nt "discuss" with them, we should "convert" them! We don't have to ask the Pope for reunion, but for conversion BACK to Orthodoxy. A reunion without a substantial return to the faith AND praxis of the first millennium would be uniatism with an heretic and a spontaneous submission to the Beast.
A "dialogue" with heretic would mean the possibility that Catholicism is still a part of the Church. I don't subscribe the idea that we are "separate brethren". The Church is one, indivisible, and survived only in the Orthodox Church. RCs violated lots of canons from the first seven Ecumenical Councils, so they are outside of the Church. If their sacraments preserve some validity (which I'm not even questioning at all) it's by divine oikonomia, and not because these rites are celebrated within the true Church.
I make my compliments to Mark of Ephesus: you surely demonstrate no compromises in faith, exactly as the holy bishop who opposed to the weakness of the Greeks at the Council of Florence.
Peace be to all of you. Let's pray that the future Pope is going to restore a TRUE unity (and thus conversion), since I don't think Benedict XVI is trying to unify the Church by love of Tradition and Orthodoxy... otherwise all those words on the imperfection of the Orthodox faith and sacraments administered outside of the (Catholic) Church would have never been said.
In Christ, Alex