Brian, Constantine II's parents, Constantine I and Helena were either xtians or sympathizers. When Diocletian actually did begin an official persecution of xtians it was noted that Constantine I was less enthusiastic about enforcing the edict than his counterpart, Galerian, in the east. And Helena was a famed xhristard pilgrim and bullshit artist. So Constantine II probably grew up with a lot of xtian bullshit being dumped on him or around him. Nonetheless, he seems to have remained a firm devotee of Sol Invictus which would have been popular in the army.
Look at it in modern terms. The Orange Fucktard has had advisors like Tillerson, Bannon, McMasters, and Miller. He is as transparent as Saran Wrap so it is easy to see which of his advisors he is listening to at any given time. At 1,700 years removed it is a bit harder with Constantine but even then there were factions. Xtians love to talk about how Constantine II convened the Council of Nicaea - probably because his advisors were telling him that there was a problem - but they are less inclined to talk about how this "saint" of theirs spent much of the rest of his time murdering his enemies. Xtians were always cherry-pickers!
Look at it in modern terms. The Orange Fucktard has had advisors like Tillerson, Bannon, McMasters, and Miller. He is as transparent as Saran Wrap so it is easy to see which of his advisors he is listening to at any given time. At 1,700 years removed it is a bit harder with Constantine but even then there were factions. Xtians love to talk about how Constantine II convened the Council of Nicaea - probably because his advisors were telling him that there was a problem - but they are less inclined to talk about how this "saint" of theirs spent much of the rest of his time murdering his enemies. Xtians were always cherry-pickers!