Yes, he is insane. I predict he will go down in flames next year. After a couple of DNFs at McLaren he will totally lose it.
http://www.sportinglife.com/formula1/news/story_get.cgi?STORY_NAME=formula1/06/10/03/manual_115203.html
"Fernando Alonso has sensationally accused Renault of sabotaging his title campaign by making intentional errors during the Chinese Grand Prix.
Alonso lost the lead in both Sunday's Shanghai race and the Drivers' Championship after Renault put the wrong tyres on his car during his first pit-stop and then compounded the error by bungling his second stop.
And according to the Spaniard, the mistakes happened because Renault don't want him to retain the world title as he's leaving for McLaren at the end of this season.
"They wanted us to finish second and third because they do not want me to take the number 'one' to a different team," he told Spanish newspaper AS.
"They are not helping me as much as they could."
The 25-year-old went on to claim that Renault are now only interested in the outcome of the Constructors' race.
"Some [at Renault] are happy because we went past Ferrari in the team battle," he said.
With two races to go, Renault have a one-point lead over Ferrari in the Constructors' Championship, while Alonso is second in the Drivers' standings because even though he has the same number of points as Michael Schumacher, the Ferrari driver has won more races this year."