People have often used the principle of Sa's action, feigning injury or cheating in some people's terminology, as the reason for their disgust. Yet we have another player doing the same thing, to a greater extent in my opinion, and getting almost zero criticism.
The reality, as I see it anyway, is people are just pissed off because it ended up with a goal and so they're piling in with the principled view as a thin veil over their true annoyance. That's why no-one cares that Jimenez has done it, nothing bad happened as a result. No-one would care about Sa doing it either if the ref had stopped the game for him to get treatment.