Y does Obama think his supporters are dumb?

Because for the most part they are. Most blindly support his message of change without asking the questions of what kind of change. What specifically are you going to change and how? He has not been vetted in any way and gives no details about his plans for change. He walks on stage like a rock star, says change 50 times, people faint, and he leaves the stage waving without have said anything of substance.