Also, Curry himself was sent off for almost the exact thing the Fijian did yesterday. Down to the attacker moving their head last second- which was apparently ok for the Fijian but not for Curry.
Moreover Etzebeth's head collision yesterday was more of a red than the Fijian one (that had mitigating circumstances). I think after the Curry incident, the referees took stock and decided that they needed to be slightly less brutal with those cards where it's clearly an accident.

