McLaren team boss Ron Dennis cleared Juan Pablo Montoya of blame after his crash with Antonio Pizzonia near the end of the Belgian Grand Prix.
Pizzonia was fined £4,500 for the crash, which happened when Montoya lay second and let Fernando Alonso take second and move closer to the title.
"Pizzonia waved Juan Pablo past and at the next corner Pizzonia came straight into the back of him," said Dennis.
"Juan Pablo was the blameless victim of other people's mistakes."
The crash was doubly frustrating for McLaren.
Not only was it the second time in three races that a late crash denied them a one-two finish, but it also harmed Montoya's team-mate Kimi Raikkonen's slim title chances.
"We had a comfortable, well-judged, disciplined team-oriented race which should have been a comfortable one-two," said Dennis.
"It is bitterly disappointing when you do things well and something out of your control happens."
Pizzonia apologised, and insisted it was all down to a misunderstanding.
"I was on dry tyres and lapping quicker than him. He was quite slow maybe because his tyres were not good anymore or maybe he was just cruising to the end of the race," he said.
"I thought he saw me and when he braked really early I thought he was trying to let me by.
"I am sorry for him because I am not here to destroy anyone's race. I destroyed my race too."