That clears it up.
I'd explain that among canonical Orthodox churches, there are no sections; if a church breaks away, it is schismatic and no longer part of the canonical Church, whatever it may call itself. Thus, it is critical to be in communion with the Church worldwide via your regional Church (The Russian Orthodox, or Greek Orthodox, or Antiochian Orthodox Churches, for example) which your local church should be a part of (In America you actually have this weird situation where you can choose which one to be in, but it really doesn't matter - it's primarily a matter of differing languages and local practices. So for example, this organization is schismatic (despite its claim):
http://www.apostle1.com/and this one is canonical:
http://www.oca.org/Within the Church it is possible to have differing views on non-dogmatic issues (and not possible if there is established dogma - so you can't have a dissenting opinion on abortion or homosexual behavior and be Orthodox, but you CAN differ on whether women should cover their heads (that would fall under local practices and pious traditions based on Scripture or other Tradition, but not dogma).
I'm not sure which "fundamentalists" the monk is referring to - possibly schismatics or potential schismatics, like what happened this last year with Bishop Diomede in the Russian Church (He went bonkers in a fundamentalist way, took a few priests with him and broke off - wound up being stripped of his position).
http://www.spc.rs/eng/holy_synod_russia ... ommon_monk Basically, they place their own interpretations above established Tradition and Church leadership and concepts like recognizing one's own limitations and/or obedience and humility go out the window. They would be "sects" - literally, divisions, as that what "sect" means.