J.K. Rowling Mocks Piers Morgan for Refusing to Compare Donald Trump to Adolf Hitler

On Friday night, Piers Morgan said President Donald Trump's immigration order was not a "Muslim ban" because it did not apply to most Muslims. To this, Australian comedian Jim Jefferies shot back, saying "give him a chance," and adding that "Hitler didn't kill the Jews on the first day, he worked up to it!" J.K. Rowling, author of the bestseller Harry Potter series, chimed in — against Morgan.

Early Saturday morning, Rowling retweeted a video of the interview, saying that "watching Piers Morgan being told to f*ck off on live TV is *exactly* as satisfying as I'd always imagined."

Morgan shot back, tweeting, "This is why I've never read a single word of Harry Potter."

To this, Rowling responded, "If only you'd read Harry Potter, you'd know the downside of sucking up to the biggest bully in school is getting burned alive." (Spoiler: this may actually have happened in Rowling's books.)

The Twitter showdown really took off, as celebrities chimed in on the side of Rowling, Jefferies, and the Hitler comparisons.

Don Cheadle, who plays Colonel James Rhodes in the Iron Man and Avengers films, merely retweeted Rowling, adding "Delicious!!"

George Takei, famous for his role as Hikaru Sulu in Star Trek, had a different explanation for why Morgan had never read Harry Potter. "No, it's because you lack imagination, and small children instinctively fear you," the actor quipped, tagging J.K. Rowling for support.

Jojo Moyes, a writer for the 2016 film Me Before You, tweeted, "Public service announcement: @jk_rowling currently making mincemeat of Piers Morgan. 'Celebrity toady' may be my new favourite insult."

The "celebrity toady" attack came after a few spats between Rowling and Morgan, in this (rather nasty) tweet, "The fact-free, amoral, bigotry-apologism of celebrity toady Piers Morgan is, of course, why it's so delicious to see him told to f*ck off."