Why did the scriptwriters use Cortez? They could have invented an exploration party and really cranked up the suspense (before killing everyone except the one decent guy).
SciFi Channel is the new grindhouse for SF and fantasy films.
If the Natives tried to placate the tyrannosaurus by feeding it victims, they were treating it in a respectful if not worshipful way. Real wild animals don't stop with the morsels you feed them. They eat whatever they want to.
Just ask Timothy Treadwell. He thought he could mingle with grizzly bears because he had some sort of rapport with them. If you saw Werner Herzog's Grizzly Man, you know what happened.
For more on the subject, see The Best Indian Movies.