I'm not sure you do. I think Dawkins is essentially right about how religion is evil, and I think he's done a great deal for the atheist "movement". At the same, he came off looking like a sexist in the Rebecca Watson fiasco.
The point is, I think his message is correct and important, and yet I think he's probably a sexist. These two are orthogonal attributes.
Lets suppose that religion is the root of all evil. So the atheist movement goes and in time erases religion from the world. Then what?
I don't think ideas exist in a vacuum. I think that for some types of ideas and ideals they can only be replaced by an idea of the same type.
And I do sense some (disturbing) religious elements in the atheist movement. Single mindedness would be the worst in my opinion.