So, basically what you are thinking is that we really can’t trust ourselves to “know” anything at all.
Books? Suspect. Anybody can write anything at all. Events of 2000 years ago? Impossible to prove. Heck, there are people who think that the earth is flat and that men never went to the moon. (Those photos and maps etc. are all “made up” by vast conspiracies).
God? Unknowable. Good and evil? Relative. Religion? The biggest evildoer on the planet with its wars and factions.
Ho-hum. The idea that religion and Christ were all part of a GOD-MADE conspiracy against humanity smacks of conspiracy theory on your part. Kind of circular quasi-reasoning.
Very nihilistic. Very sad. Takes the sort of mindset that humanity is at once both the acme and the nadir of life as we know it. Oh sure, techically your idea of “god” as Creator, mixed with a rather dualistic “satan”, supposedly is the “greatest”, but oh, it’s the human person (you) who has seen through the vast evilness of “religion”, making you at least God or Satan’s equal, if not superior! And it’s the supposedly so-good 'religious" person who comes in for your oprobrium in first falling for Jesus as God (since you posit He was not), and then for all the terrible things done supposedly by religious people simply because they were religious.
But go ahead, write the book. We’re just a bunch of plain old everyday ordinary mostly Catholic people here. We aren’t the super intellectual, the theologically questioning, the humanists, the relativists, the indifferentists, the Wicca wannabees or priestess hopefuls (mostly). We probably don’t have the intellectual capacity to appreciate your utterly original concepts, especially since you’ve only deigned to offer us a couple of paragraphs on the subject itself. Knock yourself out, let us know when the book gets published. Do the work before you beg for the glory, IOW.