The problem isn't really the wildness of the idea (or its direct implications). The problem is that there is almost 2,000 years of culture and the metaphysical beliefs of well-more than half of the human population predicated upon their beliefs being entirely unique and an off-shoot of Judaism and not a fundamentally different syncretic import from the east.

Earlier today, I was listening to Evangelical Christian Radio while doing errands (my phone is broken and I live deep in Red America) and the pastor, Alistair Begg, was making the argument that the synoptic gospels are totally unique in what they are. The format is unprecedented. They're not biographies. They're not systematic theology. It's just a direct witness to Jesus Christ. And so on. Therefore, they're historically valid and true, etc.

But if you have read the Pali Canon or other collections of sutras and agamas, it's almost blindingly obvious that the structure of the pericopic episodes found in the synoptic gospels aren't really unique at all.

As a random example:

From Majjhima Nikaya 55 (trans. Thanissaro): I have heard that on one occasion the Blessed One was staying near Rājagaha, in Jīvaka Komārabhacca’s mango grove. Then Jīvaka Komārabhacca went to the Blessed One and, on arrival, having bowed down to him, sat to one side. As he was sitting there he said to the Blessed One, “Lord, I have heard it said that ‘They slaughter animals for the sake of Gotama the contemplative. Gotama the contemplative knowingly eats the meat prepared for his sake in dependence on that action.’ Those who say, ‘They slaughter animals for the sake of Gotama the contemplative. Gotama the contemplative knowingly eats the meat prepared for his sake in dependence on that action’: Are they speaking in line with what the Blessed One has said, are they not slandering the Blessed One with what is unfactual, and are they speaking in line with the Dhamma so that no one whose thinking is in line with the Dhamma would have grounds for criticizing them?”

Compared to say, Mark 7 (trans. NIV):

The Pharisees and some of the teachers of the law who had come from Jerusalem gathered around Jesus and saw some of his disciples eating food with hands that were defiled, that is, unwashed. (The Pharisees and all the Jews do not eat unless they give their hands a ceremonial washing, holding to the tradition of the elders. When they come from the marketplace they do not eat unless they wash. And they observe many other traditions, such as the washing of cups, pitchers and kettles. So the Pharisees and teachers of the law asked Jesus, “Why don’t your disciples live according to the tradition of the elders instead of eating their food with defiled hands?”

And so on and so forth. The parallels don't end there, but I've probably gone on long enough of a rant. And this wouldn't even be the first time something like that happened in the Greek world. Pyrrho very likely did something very similar. Plus, the phenomena has modern equivalents as well. Look at how many mindfulness courses and therapy interventions in the West just file the serial numbers off of Buddhism (e.g. CBT, ACT).

So yeah. The pieces are all there, but literally be damned by others if you put them together.