I agree. I think it's perfectly reasonable and interesting for religion to be a motivating force for the characters, and I think it's reasonable to explore their religion, but (at least in the context of the show as written so far) to expect the audience to start believing in it (within the context of the show, of course) is where I draw the line. I thought that they had done a really good job up to this point in letting the question remain open as to whether or not the religion was true, and, if it was, if in whole or in part. But they seem to have ruined that with this last episode.