Magnussen was fighting Raikkonen for seventh spot early in the Sepang race when he broke his front wing on the right rear wheel of the Ferrari at Turn 1.
As well as leaving Raikkonen with a puncture and a damaged car, the incident resulted in Magnussen earning a five-second stop-go penalty.
Raikkonen: Magnussen 'destroyed' race
McLaren racing director Boullier does not dispute that Magnussen was at fault, but says such incidents are understandable for someone with so little experience - and he was full of praise for how the Danish youngster dealt with matters afterwards.
"I think it was a rookie mistake," explained Boullier.
"There was probably excitement. The old guy in front was probably playing, so the youngster got trapped.
"But he kept quiet, concentrated and even with a nose change and a five-second penalty, he finished in the points.
"He did not over-react. He just kept his foot down."
Boullier said that team fully expects such incidents given the difficulty in preparing rookies for F1 with limited testing.
"He is one of these young kids who, over the last years, joined F1 with no experience," he said.
"We tend to forget that guys like Lewis [Hamilton] did 30,000 miles of testing - which is nearly equivalent to a couple of seasons.
"This kid is now 21. He joined F1 with a few days of testing, so he is doing a great job."
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