It would explain why there is contradiction's in the Bible, as there are certain Gospel's that was left out due to the council not wanting it in there
These contradictions happened long before Nicea, and they happen because the Bible was composed by many different authors, at many different times, by different civilizations.
It depends on how literally they take it. I think it bothers the literalists more than anything. Many Jews and Christians are aware of the contradictions and still faithful. They understand the historical background and modify their beliefs to make it fit. Some may call this convience, but who are we to judge what they believe?