To be fair if you remove the Disneyfication of the folklore, most creatures that lurk in the forests are usually kind of assholes.
Good chunk of folklore comes down to
>Give them alcohol or food and they won't burn down your sauna or lure you to drown in a swamp.
Only occasionally are they actually kind towards you.

Though American cryptids do seem to be a step or three above European versions in being flat out violent as fuck with zero redeeming qualities.
Maybe it's because Indians weren't exactly the noble and kind people they're painted to be. They were bloodthirsty savages who killed each other in brutal ways and never left the tribal stage.
Yes the white man is really good at violence too, but at least there's the other aspect of white altruism and not being completely irredeemable.
Maybe the paranormal just mirrors our energy.
Over thousands of years indians just kept on acting like chimps and never tried to interact with these creatures on an agreeable level and ended up creating a huge rift between our species.
Then white man turned US into a modern nation in a relatively small period of time and didn't exactly get a chance to form bonds with the paranormal either.
Now what you got is a bunch of creatures that have fed off the Indian's savage energies for ages, and a white man who has no fucking idea what type of beings he's dealing with and how to communicate with them, yet he lives where these creatures used to roam.

>>507599348
It's probably big cats and accidental falls that accounts for most of it but it is way more fun to think that the cave troglodytes from The Descent are snatching people and eating them.