Unfortuneately I don't have the education or the access to study the documents closely, I can only read what I have access to. And our access to documents of that time are limited by the group that went around eliminating documents they didn't like. Now John was baptizing who? Surely weren't Christians. The thanksgiving of the eucharist is something that every jew did at passover, the drinking of wine and breaking of bread was something every one at that table grew up with, the wine representing spiritual essence and bread material essence was nothing new, yes Jesus added the connection to his body and blood...but every Jewish household and congregation was performing similar rites then and today.I think you'll find that's not the way it pans out, if you study the documents closely.
No-one who was not baptised was called Christian or able to participate in the rites. The Eucharist was the central focus of Christian life from Paul's time. Likewise the Didache (100AD) points to existing institutions and structures.
I agree their were existing institutions and structures...but also believe there was quite a divide created early on...Paul and the family and followers of Jesus were on quite the different path. The divergence of denominations and non denominational thought I believe came quite early. We can read about the divisions of thought while he was alive, and the work he had to do to keep the twelve on the same page.
I'm still wondering why Traditional Christianity wouldn't simply be including loving your lord your G-d with all your thought all your strength and loving your neighbor as yourself. Why traditional Christianity wouldn't consist of forgivng seven times seventy and of flipping over the tables of those that are trying to make an income off of those that wish to come closer to G-d.If we were going to draw lines, then perhaps historically there are some obvious delineations:
Traditional Christianity
Discussions in this area would be mainly historical reference.
Post-Modernist Christianity
It seems to me the scriptures Jesus studied were the Torah, Tanakh and Midrash and his discussions revolved around telling stories, parables which expanded on that thought....about not using the law to condemn, but expanding it 'ye without sin' ... 'take the beam out of my eye'...and raising those up around him with love and respect...I don't see Traditional Christianity has a history discussion but a life to strive for.
Now Post-Modernist Christianity...that starts after Jesus's death and is cemented in place in the 4th century and has had a hold on thought since then....with some diversions...all of which creating their own niche, income stream and corner of their market...