Request for Logic: Why does the ACM act against the interests of scholars?

"[T]he "Research Works Act" makes it clear that ACM's membership in the Association of American Publishers is an egregious and unacceptable instance of working against the interest of scholars and ACM members. We should be thinking about how to demand that our professional organization, the Association for Computing Machinery, do two things: 1) withdraw from the Association of American Publishers 2) take the clear position that the so-called "Research Works Act" is an unacceptable piece of legislation that is not supported by the computer science community...."