Disagreements are a powerful thing some could argue they can destroy some can argue that they can create. in the case of the Council of Nicea I would say disagreements with the help of some confusion helped shape how we View the nature of Christ. The confusion and disagreements came from heretical groups such as the gnostics and subordinationists but the most notable ones were the Arianists and their leader Arius. Arius you could say was the most vocal about his opinions he believed that his Christ was the right Christ and the only Christ the logic behind his beliefs really didn't add up which contributed end divided or early Christians. so you can basically say that Arius was a large reason why the Council of Nicea happened. Now I understand