I've thought about this myself.
But when I read the Gospels, I was surprised to discover that what Jesus was teaching is the 10 commandments.
More importantly, by saying that no man may judge another on behalf of God, that we don't need to attend any church as such and that we may not kill, he effectively overturned all of the subsequent Jewish laws. What was left were his clarifications of the commandments. Each of us is answerable only to God.
The problem was that he was teaching at a time when the Romans were occupying Jewish lands. The government was run by a Roman puppet and over seen by a Roman goveror. The clergy were the only means left to maintain Jewish identy. So, along comes Jesus and tells everyone that the clergy have no special status. Even that they are hypocrites.
I suggest, however, that what Jesus was actually teaching was the same as Moses. Namely, the commandments and to teach these to the world.
Things started to go wrong when the Romans realised that those, following Jesus' teachings were becoming rather strong. So they hijacked the whole organisation and sought to re-write it to suit themselves. We were prevented from reading the Gospels for over 1000 years.
Edit, Just realised i've written that we don't need to attend any church or such , whereas I meant that we don't need to attend any church as such