If the Old Testament, Paul's spin doctoring and revelation were not part of the Bible as accepted by Christians how diffferent would the Church and Western European society be
1. I take offence at "spin doctoring".
2. You'd need to completely re-write and re-work the Gospels, as they're grounded through and through in the Law and Prophets. How can you declare Jesus the son of David and seed of Abraham if you cut out Genesis, Kings, Chronicles, the Psalms? Nonsensical. You'd also need something akin to Paul's letters to further delve into how, why and what Jesus was doing on the Cross, the New covenant, etc etc.
If the Old Testament, Paul's spin doctoring and revelation were not part of the Bible as accepted by Christians how diffferent would the Church and Western European society be
I am unsure whether or not I should tell how the Nazis agreed with that and wanted to eliminate those portions. Is it considered ad naseum Hitler?
Nothing sinister about it, actually. It's twentieth-century fashion, basing your theology on the purported historical Jesus, going "back behind Paul" and using the OT to understand Jesus' teachings.
Removing the Old Testament would also bring about an immediate break with Judaism far earlier, almost certainly leading to the persecution and extinction of Christianity within a generation of Christ's death. Christianity's early growth depended a lot on the legal protection afforded to it as a Jewish sect and the use of synagogues as pulpits to reach the local community. Unable to preach in the Temple or synagogues, they'd be branded as an atheist sect meeting in private, which I believe was illegal under Roman law.