Who changed the rules

[laurel]

It was a sending off his arm stopped a goal ... the rule is that simple.

In Fifa’s laws of the game 2005, rule 12 states that a free-kick or penalty will be awarded if a player “handles the ball deliberately (except for the goalkeeper within his own penalty area)”.

[les_taxi]

I seem to remember if the arm deflects the flight of the ball to the advantage of the defender its a penalty.
Why not just award a "penalty goal" no need to send player off

[darren-b]

Attempting to play the ball with your chest (which he admits he was) whilst having your arms away from your body is asking for trouble.

Type of decision (the sending off not the penalty) that could go either way so in my opinion the ref wasn't incorrect to send him off.