I'm sorry, am I supposed to emphathize with a multimillionaire best-seller author who, instead of enjoying her wealth in some yacht somewhere (or whatever it is rich people do), decided to spend her free time riling up some trans people on twitter?
It's fair to claim Rowling's opinions are bad and it's also fair to say she was dumb to express them. But it seems like a non sequitur to point those things out when someone produces her as an example of someone being attacked for expressing their controversial opinions.
If you want an example of a current person with a true belief that is not accepted by their society that seems by definition hard to produce. Especially to an anonymous member of the society.