Was Jesus of Nazareth a religious loon?

[Fake Messiah]

So he got directly from Peter what Jesus said.

If Cephas is Peter, but it was some other guy that gospel writers turned into Peter.

I had this conversation many times on this forum, you can look up topic "First century void"

note Paul differentiates his teaching from the teaching of Jesus),

Sure, Paul's teachings are different if not opposite than Jesus's, that's why some Christians consider Paul to be the antichrist.

1 Cor 9:14 (cf Matt 10:10, Luke 10:7), 1 Cor 11:23-26 (last supper).

The first thing to notice is how Paul claims to know this information: he says he received it “from the Lord,” not from anyone who was actually there. Then we go back to Galatians 1. 11-12.

So why did Paul have to tell his flock as though he was the only one who knew this story?
Paul’s Lord’s Supper does not look like a historical account of a “last supper” (a term he never uses), but a celestial vision of ritual instructions from his Lord, directed to future generations and not to any disciples at dinner.