Why is J.K. Rowling under attack and being reported by the BBC?

The BBC report 

https://www.bbc.com/news/entertainment-arts-45666350 that:

 'JK Rowling has defended the casting of a Korean actress as Voldemort's snake Nagini in the Fantastic Beasts sequel.

The latest trailer has revealed Claudia Kim as Nagini and sees her transform into a snake.

Some have criticised the fact the only Asian actor in the cast plays a reptile that is a villain's slave.'

Why are the BBC being so ready to report critics of J.K. Rowling accusations of race issues? The BBC have been such fans of J.K. Rowling previously. 

The explanation may lie in this:

'For months author J.K. Rowling has been warning about the dangers of anti-Semitism in England, sparring on Twitter with critics who either downplay the phenomenon or say its proponents are confusing criticism of Israel with Jew-hatred.

Now, in her newest book, she includes a character whose obsessive anti-Zionism morphs into anti-Semitism.

"Lethal White," the fourth series in Rowling's Cormoran Strike mystery series, written under the pen name Robert Galbraith, features a pair of hard-left political activists who believe "Zionists" are evil and have a stranglehold on Western governments.

Extortionist Jimmy Knight's extreme hatred of Israel has led him to hate Jews.

"I wouldn't trust him if it was anything to do with Jews," Knight's ex-wife tells a detective. "He doesn't like them. Israel's the root of all evil, according to Jimmy. '

You can read more about this new book here 

http://www.israelnationalnews.com/News/News.aspx/252341 but obviously not on the antisemitic, by at least one of the IHRA examples, BBC.