If the arm is considered to be in an unnatural position when contact is made with the ball then it passes for deliberate, yes?
He jumped with his arm up and half forwards in front of his face / head - like it or not, and looking at the picture below there really shouldn't be any argument about this, that is not a natural position for a defender to be in. In fact it's just a pathetically naive challenge for anyone to make when fighting for an aerial ball in the penalty area.
As for Muller, I substituted him INTO my Dream Team entry last night thinking he can't be shit again, but Jeez, he was worse than ever. I was stunned to see that he gained me 3 points by being a 7+ rated player!!!