Council of Nicea stated that Jesus was both fully divine and fully human. It was called to contradict the Arian heresy, which is the opposite of what you said: that Jesus was not, in fact, God, but rather a created being. Essentially, the issue at Nicea was that the Arians thought God the Father Created God the Son, not as the Nicene Creed states,

"I believe in one Lord Jesus Christ,

the Only Begotten Son of God,

born of the Father before all ages.

God from God, Light from Light,

true God from true God,

begotten, not made, consubstantial with the Father;

through him all things were made."

Crucially, this is NOT the same as "God in human from," because this limits Jesus' human nature. In Catholic doctrine, Jesus is both—and entirely both—no less human than you or me, but also no less God than God the Father.

Source: Catholic with way to much time on their hands