I thought I read the thread fairly carefully, and nowhere did I see a united front against Islam at the heart of the discussion. What I saw were arguments about why there should be inter-communion. I see no reason why inter-communion is a necessary part of a united front against Islam. Leaving aside the historical record of what has sometimes happened when Orthodox look to Rome for help against Islam, we can, at a minimum, look at the here and now of the Balkans, where the Vatican could have argued that it was in the best interests of Christendom to keep Islam contained, rather than to encourage and embolden it by the West siding with the Muslims. I have no problem with the fact that the Roman Catholic world did not side with the Orthodox, because it was looking out for its own interests in the region, and it saw its interests being more served by a weakened Orthodox populace than by a weakened Islam.
"We reach out over and over again and keep getting slapped down again and again."
I'm new to this discussion, and I'm still deciding whether it is a helpful one, so I don't know what you're talking about here exactly, but I'll take your word for it. Orthodox and Roman Catholics have a different concept of what unity means, and what its prerequisites are. I don't see how that constitutes a "slapping down" when we say that.
"Finally, Vicomte states that, since the EO wish to keep the POLITICAL differences, the only option left for unity is to politically change the persons in the EO world."
You'll have to explain that. It would seem to me that you are turning the Orthodox position on its head. What Orthodox Christians are all for is unity in faith -- sharing the chalice and organizational unity follow that. We do not believe that that unity currently exists, and therefore any union would be only political in nature. It is not that we are for keeping political differences, it is that we oppose a political solution to a spiritual problem.
What is possible are political solutions to political problems (i.e. having a unified political front against Islamic expansionism), and also possible are spiritual solutions to spiritual problems (i.e. genuine dialogue that will allow Roman Catholics to understand the Orthodox approach to the faith, and to therefore understand why union at this time is, from our perspective, not possible or desirable.)