Hrmph.
The entirety of the non-exclusivity claim rests not on a Biblical exegesis, but on the footnote [10] which leads us to
http://www.amazon.com/exec/obidos/tg/detail/-/1885652054/qid=1061498961/sr=1-5/ref=sr_1_5/002-0731783-2227220?v=glance&s=books in which the excerpted pages begin with the rampantly Marxist:
"Over the last decade it has become only too clear that our subscription to the dominantly materialistic and mechanistic philosophies which determine the course of what we call the 'natural' sciences and their ramifications in the technological, industrial, political, economic, educational and practically every other sphere, has led us to build a type of society that desecrates and mutiliates human and natural life in all its aspects. ... We cannot prevent the proliferation of armed conflict and mass murder while we still regard the production and sale of deadly weapons not as an inhuman form of criminality and hypocrisy, but as something in which nation states and their human labor forces can quite legitimately engage in order to support their economies. Nor can the fight against pollution and mass starvation or anything else have any chance of success, so long as the means through which it is waged involve the same 'logic of production,' the same free-market selling techniques and the same ruthless competitive exploitation that have produced these ecological and social catastrophes in the first place."
And that's page ONE! Hitlery herself could hardly turn out a shriller diatribe against conservative principles.
Small wonder that by the time this "creative interpreter of the living tradition of the Orthodox Church" gets around to Christianity and other religions he rejects the idea that Christ is, as He said, the only Way, out of hand.
To their shame it looks like the American Greek Orthodox church has elected to attach itself to this along with radical environmentalism and other wackiness, which can be read on their site.