It is factually incorrect, but I never attempted to deny that, so I am unsure as to why you feel the need to level this accusation at me. My issue is with using them as doctrinal authorities. Plato and Aristotle also had theological influence.
I don't make a distinction between the Church and the Orthodox Church.
Neither do I. Origen was baptized Orthodox, in communion with the Orthodox, and died an Orthodox. He was also a confessor; he was forced by the evil Roman pagans to burn off his own manhood in lieu of sacrificing to the Roman Gods (contrary to popular belief, he did not castrate himself for other reasons; I believe it was Eusebius of Caesarea who popularized that, and Eusebius was in fact an Arian sympathizer and thus arguably did not die in the peace of the church).
Later, a Roman Emperor decided he had the power to anathematize a dead man, who could not repent.
You'll notice that you, the Oriental Orthodox, have not canonized Origen a saint after all these years, even though you didn't take part in the council to anathematize him. Why do you think that is? He was a prolific writer, a dedicated ascetic and a renowned thinker--yet never canonized, despite being an early Christian who fits these qualifications. There is a reason he was never canonized, it's because there were some serious issues with his teachings.
The council did not anathematize him; St. Justinian did, as he had just anathematized Theodore of Mopsuestia and Diodore of Tarsus in order to appease us, and I believe he included Origen as well in the interests of pleasing the long-brewing anti-Origen movement. Which did not include the Cappadocians; indeed, of the major church fathers of the 4th century only St. Epiphanius, who I do admire, except on this point, blamed Arianism on him, and St. Jerome concurred.
There is, as you say, a movement to rescind the anathema against Origen, but I am not concerned with it anymore than I am concerned with the movement to rescind Augustine's sainthood.
Greek, and a year.
When I first converted to Orthodoxy, I tilted at a few windmills, criticizing Catholics for the filioque, criticizing Protestants for this and that, but I reccommend as a general rule that the newly baptized focus instead on learning all of the liturgical services of the Church, reading the Prologue of Ohrid, The Orthodox Way, Orthodox Dogmatic Theology, and the works of the Fathers, particularly St. Athanasius, John of Damascus, Cyril of Jerusalem, John Chrysostom, Ambrose of Milan, and Epiphanius of Salamis, and indeed, Origen, through the anthology of "safe" writings the Cappadocians compiled, the Philocalia.
In terms of polemics, its generally best to focus on those churches the Orthodox Church is not actively in the process of restoring ecumenical relations with, but which are instead trying to proselytize in our native lands.
It is easy when we come to the Orthodox church to say "Wow, this is so much better than what we had before!" but, one can then fall into a triumphalism which actually alienates prospective converts to Orthodoxy.
On CF.com in particular, furthermore, there are many areas of apologetics one can engage in, with non-Christians or people who reject the Trinity, where Orthodox doctrine can help win arguments, because, for example, the New Atheist apologists who come here are relying on books by Dawkins et al which were written targeting a strawman charicature of Orthodoxy; they cannot handle Orthodox arguments. Indeed, I saw once as a lurker in Christian Apologetics the tragicomic spectacle of a New Atheist accusing an Orthodox member of trolling and wasting his time, because the Orthodox Christian was presenting an understanding of Christianity that simply did not accord with the man's preconceived categories.