I don't think I am. I think I approach the question of the gospel in a wholly psychological manner - i.e. there was something 'in it' for the believers, that's why they believed in the gospel and the story of Jesus.I think your placing to much certainty on the mystery here. Yes it was there, but no where near primary to the stupid poor peasants and pagans that were proselytized to.
Can you or Bernard or any of the standard bearers for the 'it's a historical narrative first and foremost' understanding of the gospel explain to me why a Gentile would care about this 'peasant rebellion' in Palestine? I get the Palestinian rebels believing in a messiah called Jesus who was crucified. Somehow - sort of - I get how this 'original belief' in a rebel leader morphed into a magic belief in the crucified rebel leader or something or other. Not quite sure how a dead messianic Jewish leader 'saves' his original followers who were left behind but let's suppose something like that occurred along the lines of Sabbatai Zevi https://en.wikipedia.org/wiki/Sabbatai_Zevi
But the Donme never expanded beyond the original messianic community before 1666 and indeed severely contracted in numbers. The thing I never get about this 'historical community of Jewish rebels' understanding is how the rebellion of Jesus fails ... and not only does everything get transformed through magic and divinity but suddenly outsiders (Gentiles) are brought into the fold in mass numbers. I don't get it because it doesn't make any sense.
If Jesus was the messiah for reasons X, Y and Z for the Jewish rebels - like Sabbatai was the messiah for the ma'aminim because of X1, Y1 and Z1 I don't get how a wholly different 'high Christology' develops that somehow (a) is able to retain some of the original members of the messianic community and manages to attract massive numbers of new Gentiles. It can't have happened in my estimation because there is no common ground between the original Jewish rebels (who are clearly massively pro-Jewish) and the rest of the world which inevitably (as is always the case) hated Jews and Jewish beliefs. It's a bridge too far for me.