What about the foul by Leigh-Griffiths?

Celtic fans and management are making a lot about not getting a penalty in the game v Malmo but are saying nothing about Griffiths blatant knee to the baws that would have seen him ejected in any other game. They also conveniently ignore the leniency of the ref when a second yellow should have been given to Bitton for another wild tackle.

As for the non-penalty, the goal was disallowed for obstruction by Griffiths on the goalkeeper.

Why is it never their own doing when things go wrong?