OK, I see where that came from.
This Heraclius guy does look a lot like Jesus -- Beard, Robe, the dove on his shoulder. Heck the only thing missing is the halo. A lot of people might have been confused.
"A lot of people might have been confused."
See things seemed to be going so good and looked like things were progressing that the ruling religious thought that in spite of the ruthless controls of the Roman Empire and the fact that the Emperor claimed to be god and all the wars going on around them that the time was right for Messiah to come. Along comes Bar Kokhba (Numbers 24:17: "There shall come a star out of Jacob" ("Bar Kokhba" means "son of a star" in the Aramaic language) to lead them out of the Roman captivity.
After Jerusalem had its head handed to it and the Temple Mount was desecrated, never to be used again for religious purposes, they figured out they had been snookered and that the times were not getting better and began to refer to Bar-Kokhba as "Ben-Kusiba", a derogatory term used to indicate that he was a false Messiah. The Jews began then to revise their concept of Messiah.