What do many liberals/skeptics/agnostics/atheists (like Dan Brown of The DaVinci Code book and movie fame) , Muslims, Jehovah’s Witnesses, Mormons, and many other people have in common as a mis-perception of Christianity? Sometimes it is just misunderstandings, but sometimes there is deliberate deception and outright lying about what happened at Nicaea. If told often enough, the mis-understanding gets embedding in people's thinking.
You can read this article and gain a great deal of information. It even include some links to some other good articles on this subject by Dr James White and Dr John Piper.
Beggars All: Reformation And Apologetics: The Council of Nicaea – Pictures and Images can be Deceiving