So basically, the Citadel races are fearful of AIs because of the Geth. Who killed their creators because their creators tried to kill them. This whole concept is alien to me, it's portrayed in more than place that the Citadel Council is very concerned with protecting emerging species with it's "protected planet" policy, even extending that policy toward planets with only rudimentary life on them, life that would take millions of years to achieve sentience. We've seen repeatedly that tech in the ME universe is more than capable of creating and maintaining Artificial Life. So they are either consciously or sub-consciously disconnecting that life is life, whether it's based on biological or digital processes.
All of that is based on the fact that the Quarians effectively lied about how the war with the Geth started.