What Dumbledore hasn’t realized, what is completely outside his hypothesis space, is that he’s not doing so to attack Harry, or at least not as part of a plan to defeat Harry. He’s doing it to remove all of Harry’s support except Quirrellmort himself, so as to hasten Harry’s consumption by his Dark Side. With only Quirrell to rely upon in the magical world, his conversion into Dark Harry will be much swifter.
I made a similar, though less elaborated, observation in the previous MoR discussion thread.
I made a similar, though less elaborated, observation in the previous MoR discussion thread.