@InfraBlue,
As one of what the god squad call an atheist, i'd like to point out that i've long been aware of these controversies--and in fact, knew of them before i had even given conscious consideration to the question of whether or not any gods exist.
You mention the opinion of the council at Nicaea. That council was not unanimous initially in the notion that the putative Jesus was divine. In fact, Eusebius, who was given the task of writing the creed, was sympathetic to Arius, and only reluctantly agreed to the task, refusing to completely endorse it even when it was finally written.
Addiitonally, the "barbarians" who were Arians--largely the Visigoths and Vandals--set up the kingdoms in North Africa, which continued in what orthodoxy called heresy until they had been overrun by the Muslim holy warriors after the death of Mohammed. They didn't suddenly decide at some point to adhere to the Nicene creed.
And Nicaea didn't put the issue to rest forever in the rest of the christian world, either. The Italian Anabaptists in the 16th century widely differed in their christology, but a great many, and possibly a majority, rejected the divinity of the putative Jesus. The Socinians derived from them, and many of the Socinians did not believe in the divinity of the putative Jesus, either. The Racovian catechism, drawn up among a minority Protestant sect in Poland in the late 16th century, and published there at the dawn of the 17th century, held that your boy Jesus was not co-eternal with god.
Despite the propaganda of the various Orthodox and Catholic churches (were you even aware that there is and long has been more than one Orthodox and more than one Catholic church?), the issue of christology was not settled at Nicaea in 325 CE.