Why even the robbers mocked Jesus in Mark 15:32

[Giuseppe]

27 They crucified two rebels with him, one on his right and one on his left. [28] 29 Those who passed by hurled insults at him, shaking their heads and saying, “So! You who are going to destroy the temple and build it in three days, 30 come down from the cross and save yourself!” 31 In the same way the chief priests and the teachers of the law mocked him among themselves. “He saved others,” they said, “but he can’t save himself! 32 Let this Messiah, this king of Israel, come down now from the cross, that we may see and believe.” Those crucified with him also heaped insults on him.

(Mark 15:27-32)

While expecting possibly the help by someone about the precise quote of Photius (see here), I suspect that even the crucifixion of the two robbers with Jesus could be used to neutralize the separationists who preached that the true Christ stood before the cross mocking the crucified man.

Note that Mark says that also the robbers mocked Jesus.

Could be there, in the place of the crucified robbers, a not-crucified Christ who was mocking the man Jesus on the cross?

The two robbers served to make 'scorched earth' around Jesus from any possible rival Christ mocking him!

A scorched-earth policy is a military strategy that aims to destroy anything that might be useful to the enemy while it is advancing through or withdrawing from a location

https://en.wikipedia.org/wiki/Scorched_earth

[Giuseppe]

It is curious that Simon Magus adored the god of the Jews:

The author asserts that the God of the Jews, whom he calls evil, whose servant Simon Magus was, is one God, and Christ, whom he calls good, another.
Mingling and confounding ail together, he calls the same
both Father and Son. He asserts that He never was really
made man, but only in appearance ; that He appeared at
different times in different form to His disciples, now as a. young, now as an old man, and then again as a boy, now taller, now shorter, now very tall, so that His head reached nearly to heaven. He also invents much idle and absurd nonsense about the Cross, saying that Christ was not crucified, but some one in His stead, and that therefore He could laugh at those who imagined they had crucified Him. He declares lawful marriages to be illegal and that all procreation of children is evil and the work of the evil one. He talks foolishly about the creator of demons.

https://archive.org/stream/libraryofpho ... t_djvu.txt

[Giuseppe]

Evidence that Simon the Leper is Simon Magus, a mere adorer of YHWH as supreme god.

The author asserts that the God of the Jews, whom he calls evil, whose servant Simon Magus was, is one God, and Christ, whom he calls good, another.

Hence Marcion hated Simon Magus as "Simon the Leper".