The Dane has been unimpressed with England's treatment of Gunners pal Theo Walcott.
He said: "Theo can be a lesson for the way you treat Jack. It's important to take it easy and realise he is a kid, even though he seems very mature."
Walcott, 21, was left out of last year's World Cup squad - with Capello since admitting it was the wrong decision.
Bendtner added: "Theo has done well to cope with everything that has been thrown at him. He's always very grounded.
"Youngsters are always put under a lot of pressure very early in England but Jack can be a great, great player for his country."