Someone stole the body!

[Jehanne]

Unlike the Gospels, good historical sources from antiquity are NOT anonymous.

The gospel accounts were not anonymous. The Gospel according to John explicitly states that it was written by the Beloved Disciple, an eyewitness to Jesus who was present at the crucifixion. The pagan Celsus believed the Gospels were written by eye-witnesses even though he thought they were lying.

…people write diaries with the intent that someone, someday, will read that diary!!  …  Just because someone was an eyewitness to an event does NOT automatically make their account true.  

The Gospel accounts were not diaries. Diaries are written for personal reasons to one’s self. The Gospel accounts were written to be read publicly and openly preserve a community tradition. Fabrications and inaccuracies would be quickly exposed.

The author of the Gospel of Luke is not a trustworthy source.  For starters, historians do not know who he was…

You mean other than he was the gentile (Col 4:4) that wrote the Gospel according to Luke and Acts of the Apostles, Saint Paul’s sidekick (Phil 24), and a doctor (Col 4:14)?

… [we don't know] when he wrote his Gospel…

Being a contemporary of Saint Paul kinda narrows it down. What do you expect a notarized form in a postmarked envelope?

… the author of Luke gets some of his historical facts wrong, blatant errors;

Fortunately William Ramsay corrected the record.

… his portrayal of Jesus is fundamentally different from the Jesus portrayed in Mark, Matthew and John.

I prefer complimentary.

I'm sorry, but I cannot accept the "7 last sayings of the dying Jesus".  As Professor Bart Ehrman has suggested during all of his public lectures, you need to read the Gospels horizontally (read the same passage in Mark, and then in Matthew and then in Luke) and not vertically (from start to finish).