Where did Jesus get His morality from?

[Anomalocaris]

Its jarring that a punished criminal was worshipped like this.

Not really, the gospel stories go out of their way to exonerate the Romans and blame the Jews for the miscarriage of "justice." As Jews became more and more unpopular throughout the late 1st and early second centuries AD this make more and more sense.

How much of that exoneration stems from cynical attempt to gain and maintain imperial patronage for the Jesus cult? I doubt Constantine would have legalized Christianity had it been a central Christian tenant that it was the Roman who had the final responsibility for nailing their man god pauper of a provocateur up like the basest criminal. If that really had been a Christianity tenant, then the god worship of the christains outside the normal Roman system of administrative religions would be seen as not just an insulting act of defiance against Roman administration, but a direct and outright declaration of rebellion against Rome itself. I think that would have led to the complete stamping out of Christianity in very short order.