In broad brush language, the "parcel" of Christianity that has been "delivered" to us by our ancestors is not the same "parcel" that Christ delivered while walking the earth. It is a mixed bag of beautiful and accurate spiritual teachings, unintentional distortions that have become ossified into dogma, and intentional misdirection of course by Roman hijackers who did the same thing to Judaism from 66-70 AD. Rome saw Christ as a threat for multiple reasons. They wanted to centralize power and Christ had decentralized his wisdom and Christ was gaining too many followers. The biggest trick the devil ever pulled was convincing the world he didn't exist. I would argue that agents acting in alignment with a Luciferian agenda make a point of infiltrating burgeoning religious movements with the goal of corrupting them in the initial generations after the leader of the movement dies. It's like aikido but very slow. This is why every religion is similar but different. They all started pointing at the same truths but they all got distorted over time, unintentionally and intentionally. They all have pieces of the truth. We just have to be familiar enough with them all to find the parts they all have in common and connect the dots.