The German needs only a fifth place in India this weekend to be absolutely sure of the championship, regardless of Alonso's result, and will win it wherever he finishes if the Spaniard does not score at least 16 more points than him.
"If in the past four years, we have come close to the title twice, it is partly down to him [Alonso]," said Domenicali. "Unfortunately, we have not been capable of giving him a car that matches his talent."
Domenicali said he did not know why Red Bull had been able to produce such a dominant car.
"Everyone is trying to work that out," he said. "But it's pointless make accusations if there is no proof. [Governing body] the FIA can check the control unit, and if they find nothing than Red Bull is obviously doing a good job," he conceded.
Alonso criticises Ferrari in Hungary
Domenicali admitted that Alonso had "crossed the line" in his criticisms of the team after the Hungarian Grand Prix, following which he was publicly rebuked by Ferrari president Luca Di Montezemolo.
"From a medical point of view, there is no proof that the accident left any permanent damage, such as problems with his sight or reflexes," explained Domenicali.
"And then there's the gentility, which would demand that we give a driver who hasn't had much luck the chance to show he deserves to stay with us.
"If Felipe was unable to deliver the performance we hoped for, it was mainly down to a hyper-sensitivity to a car that was too nervous at the rear, but in 2008, he almost took the title and I consider him as a world champion.
"We took Raikkonen because we wanted more. When we replaced him with Alonso, he was not happy and so he returns with a great desire to do well."
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