I believe that can be debated. No, I’m not prepared to do so right now but clearly ‘Holy’ can be applied as well as ‘Christianity’ to most anything or anyone but that does not make it so. The Roman Empire (imo) falls into that category.
Christianity was no longer persecuted by the Empire in the 300s, and became the official state religion of the empire (to the exclusion of all others) in 380 under Emperor Theodosius I. To this day, the Nicene Creed, created at the behest of the Roman Emperor Constantine I in 325 at the first ecumenical council, is the most common creed in all of Christianity.
No, it can’t be debated. You need to go brush up on your history.
Your opinion .... is a FAIL. Go study history madam.