In all of our postings and participation in threads, why would this be a surprise or an issue of contention to you?
However, my point was that the early Christians did not need the council of Nicea to figure it out for them and put it into writing. They had the Scriptures as well as the teachings of the Apostles, so they believed in the truth of the divinity of Christ and the triune nature of the Godhead long before Nicea.
Wrong. The early Councils were only convened in response to a crisis in the Church. Or crises. Nicea defined early Christianity, which was, shall we say, extremely variant at that point. One of them was Christology - hence the Nicene Creed.
Finally, I can tell by your response that you probably did not bother to read the article at the link. It discussed far more things than Tacitus.
It spent the first third on Tacitus and spent the rest throwing analogies about and using them as proofs. Believing Christians have no need of this author, and non Christians can use this article to attack Protestant Christianity at the very least.
The Councils were convened because of heretics that were trying to infiltrate the true faith. This was just as they were warned about wolves among the sheep and damnable heresies that would creep in. They were prepared because they had the teachings of the Apostles backed up by the Holy Scriptures and the presence of the Holy Spirit within them.