The presence of Evangelicals makes me a tad nervous, so I will sit back and watch this one out. I am skeptical that the Orthodox primates signing this are taking it at face value, whilst the Evangelicals have a political agenda associated with it.
Dear brother in Christ Alexandr, Whoever is not against us is for us.(Mar 9:40)
While some vocal evangelical groups are "political" many are as concerned as we are regarding lawmakers impinging on our "right of conscience" and freedom of speech. And while we have recourse to Divine intersession through prayer, our defense is also through the political process. "God helps those who help themselves."
Chuck Colson expresses much Catholic and Orthodox thinking and references in his commentaries and I admire him very much for his candor. In my area I have worked with Evangelicals in our Life Chains and I can tell you that there is enormous respect for all who speak out in defense of Christ, regardless of religious affiliation.
Indeed this appears to be "a line in the sand," or, to be more spiritual.... a call for martyrdom, if necessary.
Render unto Caesar, but rebuke Caesar when he tries to make himself a god, for we worship only the One True God.
Christ is among us!
Fr Deacon Paul