I take it as a sign of just how silly people generally find religion, except for the few where it's reinforced every day that they're reasonable.Depictions of the gods in pop culture are generally **** poor on the whole. There's little if any cultural sensitivity to those who still worship them, or even awareness that there are people who still worship them. Near as I can wager, things like this are simply adding insult to injury. In some cases it's because the writers are actually intending to be historical, but on the whole I chalk it up to general disrespectfulness and insensitivity to Pagan religions.
That's really the only difference that determines how they're treated, IMO, and why demigod Hercules is considered a fit subject for a rollicking action movie starring the Rock in the title role, while demigod Jesus is treated with such reverence that filmmakers often don't show his face on screen.