Why is nobody adressing the fact that the "threat" happened 30 minutes into the flight and the plane landed, err, 6h30mins into the flight to remove this "threat"?
For me, this looks as if the captain has got himself into a catch22 situation: Either he screwed up because he continued the flight for 6hrs after the incident or he screwed up because the situation allowed him to continue (read: no threat) and he still went to MIA. Whatever is true, going to MIA is difficult to be judged as the right decision - either you get rid of her as quickly as possible or you just go all the way to ORD.
As an aside, you may not like the story presented by "based on facts" and may doubt it - fair enough -, but there is absolutley no reason to hurl abuse at her and call her liar.