Elsie:
No need to, all one needs to look at are the different undertanding of sacraments [Catholic/Eastern Orthdox], Lutheran-Anglican, Reformed, Baptist, pentecostal.
The different understandings of Ecclessiology, the different understandings of justification, atonement, etc.
It is quite obvious of just on the topics that I cited, there is a wide difference of understanding on those topics [I could cite more] and all those groups read the same New Testament and the OT is the same, save 7 deutercanonicals that the Catholic and Orthodox Have that the Prots threw out.
I rest my case.
But you've PROVED nothing.