Wasn’t it Pliny that wrote to the Emporer asking what to do with theses Christians because he didn’t know who they were even though he held posts all over the empire of high cop and prosecutor , etc. Then when he wrote the letter he was I believe governor of what we call Turkey today? Maybe I thinking of someone else but this was I believe several centuries after Jesus time and the Christian movement was still so small he didn’t know anything about them.
It seems to me that this religion was irrelevant until after Constantine started to support it and then was made the state religion by another empower.