The arm was not moving towards the ball and it was in a natural position justifiable by the player’s body movement so it still shouldn’t have been a penalty.

Not every touch of a player’s hand/arm with the ball is an offence.

It is an offence if a player:

• deliberately touches the ball with their hand/arm, for example moving the hand/arm towards the ball
  

• touches the ball with their hand/arm when it has made their body unnaturally bigger. **A player is considered to have made their body unnaturally bigger when the position of their hand/arm is not a consequence of, or justifiable by, the player’s body movement for that specific situation.** By having their hand/arm in such a position, the player takes a risk of their hand/arm being hit by the ball and being penalised
  

• scores in the opponents’ goal: (1) directly from their hand/arm, even if accidental, including by the goalkeeper or (2) immediately after the ball has touched their hand/arm, even if accidental
  

And this was the World Cup final referee Marciniak who actually double checked the handball situation in slow motion repeatedly… and he still gave the penalty.

I mean, it was a text book example of a close distance deflection from his body up to his arm in a natural position. Next game they will change the rules again depending on which oil team has the most money or something.