Will Smith Slapping Chris Rock - "To learn who rules over you, simply find out who you are not allowed to criticize." - Voltaire / Jada Pinkett Smith's Bald Head

The problem with that explanation is that the image's creator didn't mean "the wealthiest, most well-connected" people; he meant "Jews."

I don't really think the working class black woman is the one who actually holds power over you as the quote says though. The ones retaliating against you for saying whatever against her is still likely going to be mostly white liberals getting offended on her behalf.
Similarly, it's also not socially acceptable to say shit about terminally ill children, but I don't think anyone believes they hold power over you either.