No, but there are few who are quite so... dedicated to their cause, to the exclusion of all others.
They are not mindless, they are capable of logical reason and thought, but are so utterly consumed by a hatred for EVERYTHING which is not a Dalek that it doesn't matter.
Such utter loathing and essentially pro-active nihilsm is a tough one to match. The Borg want to assimilate, the Empire wants to rule, the Daleks "just" want to live in a universe where anything that is not a Dalek is dead, and that they personally destroyed