I agree, it was a battle for position and Bourdais had every right to not let Massa past, besides that he did not swerve and block Massa, he just took the inside line which he could do as he was in front.Massa's lost it. He has lost all sense of reality and reason.
Massa should have had some more patience and overtake him a few corners later, he knew he was faster anyway, the same way he should have taken the outside line around Webber as he was way faster than him but he had to go and take the dangerous inside line knowing that Webber would give him a hard time.