I also found this post a bit disturbing to read, particularly because of the way it was worded.
Eastern Orthodoxy and Roman Catholocism can be said to be entirely different religions.
I'd have to disagree with you here. That statement sounds as if Orthodoxy is so different Catholicism as if it's as different as Hinduism.
Do catholics and orthodox disagree on 99% of the Nicene Creed? Rather we disagree on the phrase filioque. Now we can go on and on about what it implies, but that's besides the point: Because
the rest of the entire creed is left in tact.
In fact we have a common sacred text: The Holy Bible, including the deuterocanonicals. We also have Tradition, which explains the Catholic/Orthodox practice of venerating saints among many other things. We have the same Early Church Fathers. We also have liturgy (though not the same), where the first half focuses on the scripture readings, psalms, and the like, while the second half focuses on the Eucharist. Both East and West understand their worship as experiencing the heavenly realm.
We also believe in the sacraments, as well as the communion of the saints. Sure we have different calendars (gregorian, julian, etc), but we also do retain feast days, as well as Advent, Easter (Pascha), etc. We also have different fasting laws, but the fact remains: we both have fasting laws. We have different chanting, but the Western style is gregorian, while the Eastern counterpart is byzantine. We also have monastics though understood differently. We also have the sign of the cross (though done differently). We also regard Mary as theotokos. I was even surprised to learn from an Orthodox priest that the Virgin Mother is regarded as a mediator, similar to what Catholics claim. The East has icons, we've got statues. The general principle is the same: Neither are worshipped, rather the prototype is what matters. Of course icons have a much deeper and richer significance (which I'm fully aware of), and I love those icons, but arguing about statues vs. icons is not my point (i'm not too big of a fan of statues anyway). We also have many of the same saints as well as the priesthood, diaconate, and the bishopric.
Sure we have differences, but they don't give me the impression that we are in different religions altogether. The differences seem to be more so on regional/cultural developments.
Perhaps more significantly, both east and west have
the same first seven ecumenical councils, which focus on Christology, the Trinity, the Incarnation, which are at the root of all that we believe and practice.
I'm sure many of us can go on and on about what kind of things we have in practice. So, to suggest that Catholicism and Orthodoxy are different religions seems a bit farfetched. Of course many here would claim that the Catholic Church is heretical, or that none of the councils after the 7th council is invalid, or whatever, but I see more in common than differences.
Additionally, I don't think I'll continue coming by here if I read more 'Catholic Church is wrong' statements. Much of the attitude I see here doesn't reflect charity, or perhaps it's simply the way the posts are all worded.
-Jason
(esp. me...)
Granted, there are times when things said here would offend our Roman Catholic brothers and sisters. I refer to my comments above about colliding passions. 
