They have also helped. They often show up like folklore demons, in parts of South America, though with matching important features. They used to present themselves as faeries. Surely the gray alien look is also done to help match up with expectations of the imaginations of more modern cultures.
They are the same as they've always been.
We've just decided to keep renaming them to fit either our viewpoint or a preconditioned narrative.
They have also helped. They often show up like folklore demons, in parts of South America, though with matching important features. They used to present themselves as faeries. Surely the gray alien look is also done to help match up with expectations of the imaginations of more modern cultures.