There wasn't enough contact for a penalty. Its not an automatic penalty when you touch an attacker in the area. He had lost control of the ball, felt a tiny amount of contact and threw himself to the ground unnaturally.
'kicked him' is a slight exaggeration.
What would you call it then? There's obviously various degrees of force but a kick is a kick, isn't it?
I want to punch Valencia in the face about 95% of the time.
'kicked him' is a slight exaggeration.