I think this is an accurate summary, based on reasonable inferences.
I do have one objection. I believe that the police reasoning for the first point, as testified to by Giobbi, with some inference by me, should be expanded to read:
1. This case involves a break-in by an unknown person. That makes it difficult or even potentially impossible to solve, but the world media is watching and we - the Italian authorities - need an immediate solution.
2. This case can be solved quickly if we can accuse known persons.
3. Therefore, let's assume the break-in was staged.
4. Amanda Knox, a foreigner in Italy who can barely speak Italian, has the weakest alibi for the night of the murder; only her Italian boyfriend can vouch for her wearabouts elsewhere. And, of course, she had access to her flat that she shared with Meredith.
5. Neither Amanda nor her boyfriend, Raffaele Sollecito, seem like aggressive persons who could kill someone. But Amanda works for Patrick Lumumba, a black African, who we can blame because of racist attitudes in Italy. And he's really a foreigner here in Italy.
6. Bring in Amanda and Raffaele for questioning to force them to tell us what we - the Italian authorities - have decided that we know. This will solve the case immediately, and we - the police and prosecutor - will become heroes. The Italian courts will accept whatever evidence we choose to produce to convict those we - the police and prosecutor - accuse.
I'm not sure I share this view - I actually don't think the police/PM ever made these sorts of conscious (or even semi-conscious) decisions to shoehorn the likes of Knox and Sollecito into the frame.
I fully agree with your (1), but differ from (2) onwards. I think that the police/PM allowed themselves to be convinced that the break-in was staged, and that confirmation bias and tunnel vision led them quickly to a position where they believed with a very high degree of confidence that it was a staging. And I think that their reasoning then followed a somewhat automatic (though horribly flawed, and based on a horribly flawed premise) basis:
1) If the break-in was staged, who would have the motive to stage it and why would it be necessary to stage a break-in?
2) Only someone involved in the murder would have staged a break-in. Therefore if we figure out who staged the break-in, we can more-or-less automatically presume that this person (or persons) participated in the murder.
3) It would only be necessary for this person to stage a break-in if that person wanted to misdirect investigators to believe that the murder was committed by someone who had to break in in order to gain entry to the cottage.
4) And who would have the motive to do that? Well, only someone who had key access to the cottage, but who wanted investigators to think that the murder was committed by someone who didn't have key access to the cottage (and who was thus forced to break in to gain entry).
5) So we should look at everyone who had key access to the cottage, since we have already decided that it is only someone from this group of people who would have the motive to stage a break in.
6) (Filomena) Romanelli, (Laura) Mezzetti and Knox are the only three who have key access. There are no other keyholders other than the landlord. And Romanelli and Mezzetti both have verifiable cast-iron alibis.
7) So that leaves Knox. She has no no alibi other than Sollecito, but what if Sollecito were either involved as well or was covering for his new lover with whom he was infatuated?
And from that point on, a toxic mixture of confirmation bias and tunnel vision took hold. The police and PM had settled on this theory that Knox was definitely involved somehow, and that Sollecito was either also involved himself or was covering for Knox. And they went looking for evidence to support this theory. When they found nothing that disproved their theory, and when they were able to interpret (misinterpret) other evidence to seem to support their theory, this pretty much settled it in their minds.
And I think all of this happened before the evening of 5th November 2007.
I think that by the evening of 5th November, the police (in discussion with Mignini) decided that they'd figured out for sure that Knox was involved, and that it would be pretty simple to get a confession out of first Sollecito and then Knox. We need to remember that confessions were the stock-in-trade of the old inquisitorial system in Italy, and I think that police and PM were still heavily programmed to "obtaining" confessions from those whom they believed to be guilty.
And the rest is, as they say, .........................
I really don't think the police/PM ever thought along the lines of "we need to solve this crime really fast, so let's pin it on the "most obvious" suspect" - and far less do I believe there was ever any kind of active police/PM conspiracy to frame Knox or Sollecito. I simply think the police/PM allowed themselves to be led down an improper and illogical blind alley on a trail that ONLY led to Knox (and, by extension, Sollecito), and that confirmation bias and tunnel vision worked its magical powers of deception to CONVINCE the police and PM - in all sincerity - that they'd solved the crime. When Knox made her "confession/accusation", the police and PM saw this as nothing more or less than affirmation of their skill and judgement.