He's probably not smart enough to even understand what Arianism is. I'm actually starting to suspect that he doesn't believe Jesus to be a son of God in any sense different than we are sons of God.
I my days at Jesuit High School, I met many Jesuits who didn't really believe that Jesus was God.
Good old Franz Josef Van Beeck at Loyola University of Chicago. I suppose I was a masochist to go from a Jesuit High School to a Jesuit University.
He was teaching that the Gospels were written after 70 AD. I asked him what the evidence for that was. He responded by saying that it was due to references in the Gospels to the Fall of Jerusalem. So I answered, "You mean the prophecies of Our Lord? So you're saying that you don't believe that Jesus, being God, was capable of knowing the future?" He gritted his teeth like he wanted to kill me.
At another time, he kept talking about contradictions among the different Gospels. So I asked him to point one out. So he said, "If the angel told Mary in Luke that she would conceive of the Holy Spirit, then how was it that in Matthew Joseph didn't know where Mary's child had come from?" I calmly responded, "She didn't tell him." You could practically hear him dropping a load in his pants.
One of my brothers, who went to the same Jesuit High School said, "Ah, we met Francis years ago, and many Francises, at St. Ignatius."
I remember another Jesuit priest asking the class, "Does a Mass takes place if the priest celebrates it without anyone else present?" After about five heretical responses, I raised my hand and said, "Of course it does." [I was the first to say that.] He said, "Well, the Church would agree with you."
He used to crack himself up by telling the following story in class: Some modernist Jesuit theologian was stunned by an announcement that archeologists had discovered the bones of Jesus. Another modernist asked him why that would shock him so much. He responded, "I just can't believe it. He actually existed."