Ferrari had two options to win the championship:
(1) pit on lap 1 when the safety car happened
(2) stay out and build a big enough advantage over Rosberg to pit and come out ahead.
They did neither. You can trot out the line about 'hindsight' but you didn't need hindsight for this one. I was watching the race with three of my friends, when I saw Alonso pitting I instantly said that Alonso had lost the title because he wouldn't be able to pass both Petrov and Rosberg. The previous races both in that season and at Abu Dhabi in 2009 told us overtaking was pretty much impossible there. The rest of my friends were sceptical but I knew Alonso needed a lot of luck (retirements, mistake from Petrov or Vettel) to actually pull off the title.
It's subjective but I would have made a different decision if I was in Ferrari at the time, I can say that with certainty.
EDIT: There were only six overtakes in 2009, three of which were by Sutil.
Edited by Cult, 22 August 2013 - 11:04.