"I have no idea what the Kool Aid quip means." - YouI know what it means.
I don't quite understand what your meant by it in that context. Typically in this scenario the Kool Aid drinkers would be the ones supporting Shafer.
But no matter.
...and no, it literally means to blindly follow someone without questioning them (i.e. our AD), usually as part of a group (i.e. popular opinion on this site) - hence the derivation of the term from cult suicides. So, I'm still not convinced that you have grasped the concept yet, but what else is new?