Well, groups like Donatists condemned Orthodox hierarchs as being "heretics" and "in Communion with heresy," but they were condemned as blasphemers and heretics by the Holy Ecumenical Councils.
The fact you feel that worship of Lucifer in secret societies to prepare the world and religious bodies to receive Antichrist as "no big deal" is only a sign you really don't get what this means. I clearly explained my position in my prior post here. Please review it to allay all your concerns.
No, the largest Orthodox Church in the world IS NOT IN HERESY. It safeguards the True Faith. But if you have a competent conciliar body to bring about condemnation of heresy, we would all like to know. Which council established the ROC to be in heresy? Teaching that, according to the Holy Canons, is promulgation of rebellion, schism and is tantamount to heresy. Moreover, interfering in the affairs of other Orthodox churches is likewise anathemized. Participating in a Vagante Synod so too is condemned. There isn't anything "True Orthodox" about any ecclesiologies which hold to such blasphemous and offensive views.
Jason Bently