J.K. Rowling, Harry Potter author and fierce social media activist, is fighting Brexit and bigots with Dumbledore references. Also, Dumbledore is dead. Spoiler alert?

Today is a sad day in Harry Potter history: On June 30, 1997, Albus Dumbledore brought Harry to the seaside cave, weakening himself to retrieve what would turn out to be a false Horcrux, and returning to Hogwarts only to fall into a Death Eater trap.

After hiding Harry away, Dumbledore found himself disarmed by Draco Malfoy at the top of the Astronomy Tower, and after muttering the much-discussed words, “Severus… please,” Snape killed him. (We later find out that Snape was under Dumbledore’s instruction the whole time.)

Related: Pottermore releases Ilvermorny sorting quiz, J.K. Rowling writes detailed backstory

19 years later, Dumbledore’s maker J.K. Rowling is still fighting Death Eaters — or, at least, racists and bigots — as mouse and keyboard continues to be her priority.

Probably by a wild coincidence, Rowling chose the 19-year anniversary of Dumbledore’s death to change her Twitter header image to an, um, interesting message:

This is most likely in reference to a tweet she called out on her feed earlier today, which likens British politician Jeremy Corbyn to Dumbledore. Rowling, evidently, disagrees very strongly with this sentiment:

This is obviously referring to the huge problems the British Labour party are facing after the Brexit vote last week, and Rowling has been staunchly in favor of Jeremy Corbyn’s resignation, retweeting people who oppose him and arguing with those who don’t.

Rowling, far beyond feeling like she needs to stay out of political debates, has repeatedly made her stance perfectly clear:

Remember when we cheered every time something new appeared on J.K. Rowling’s Twitter page? And look at her now, using her social media platform for a cause she truly believes in!

Now the question is: Would Dumbledore use Twitter? I feel like he’d be more of an Instagram guy. But what do I know?