I can see that you are very passionate about your understanding of these things. And I am also passionate about mine. Like you, I am trying my best to live the faith given to us by Jesus and the Apostles.
When you talk to us this way, though, it feels like you are saying we have no right to discuss this from our point of view, on a Mennonite forum. Some of us have actually spent quite a bit of time looking at the early Church and come to different conclusions than you. I would like to be able to talk openly about that, explaining our reasons.
I think I actually understand a few things about the early Fathers and early church history. And I have different understandings of Constantine than you do. We sometimes shy away from this because people get offended, but the way we understand this is actually fairly central to who Mennonites are. And why we reject sacral religion.
Even after "converting" to Christianity, Constantine continued to fund pagan cults and temples. He remained Pontifex Maximus - the high priest of the Roman Pontiffs, the priests of the Roman State Religion. Coins of Constantine continued to feature Sol Invictus, the "uncconquered sun god". The Arch of Constantine also features Sol Invictus.
I think any understanding of Constantine needs to take these things into account.