Being neutral, I don't see any fault on Luiz though, a kick to the opponent will be red no matter what. Even if Luiz doesn't act pain there, a red is a red.

Those who call Luiz cheater is so funny, tell me, which footballer that are stupid enough to stand up immediately after a kick and go and persuade the referee to not issuing a red. LOL

But, why la Luiz wanna grin after the kick, don't he know there is hundreds of camera aiming at every angle.