Genesis 48:.
[19] And his father refused, and said, I know it, my son, I know it: he also shall become a people, and he also shall be great: but truly his younger brother shall be greater than he, and his seed shall become a multitude of nations
Nothing in Gen. 48:19, nor the rest of Jacob's final words, suggests that "a multitude of nations" must necessarily mean "the dominant population of this world." "Multitude" means "many." It doesn't have to mean "nearly all."
So before you go around calling other people blind, you'd better get your own eyes checked. I think you're hallucinating.