I can think of three options.
You're not all idiots, meaning you're an above average subset of the species as a whole. Possible, but unlikely. More likely than if this were a different genre, but still...
You're not all idiots, meaning I'm wrong and people aren't idiots. Implausible, based on known information such as current and previous poltical choices, continual repetition of history in spite of an education on it, Sponge Bob, etcetera.
I'm an idiot of comparable stupidity to the average idiot. The logical choice. 