Intelligent, well-educated people are capable of appalling stupidity and herd-mentality. Or as Agent K said in Men in Black, "A person is smart. People are stupid."
And the very same person did this, to justify to lie to the whole humanity about the existence of aliens ... to keep them as stupid sheeps.
So I don't agree. It might be, that intelligent people give in to group pressure of a all in all much more stupid group.
But even if you have too much stupid people, their collective intelligence still pays off.
