Writer J.K. Rowling is speaking out against ‘liberal’ men who use misogynistic insults against politicians.

In a series of 14 tweets on Friday, the author of the Harry Potter wrote that she had “unfollowed” a man because of the word he called Conservative Prime Minister Theresa May.

“I’m sick of ‘liberal’ men whose mask slips every time a woman displeases them, who reach immediately for crude and humiliating words associated with femaleness, act like old-school misogynists and then preen themselves as though they’ve been brave,” Rowling wrote.

“Every woman I know who has dared express an opinion publically has endured this kind of abuse at least once rooted in an apparent determination to humiliate or intimidate her on the basis that she is female,” she goes on.

Rowling adds that, “if your immediate response to a woman who displeases you is to call her a synonym for her vulva, or compare her to a prostitute, then drop the pretence and own it: you’re not a liberal.”

Rowling has indicated in the past that she supports the liberal-leaning Labour Party but was displeased last year when the party re-elected socialist Jeremy Corbyn as leader. Corbyn’s Labour gained substantially in Thursday’s election but finished in second behind May’s Conservatives.

Warning: The following tweets contain language some readers might find offensive.

Just unfollowed a man whom I thought was smart and funny, because he called Theresa May a whore. 1/14 — J.K. Rowling (@jk_rowling) June 9, 2017

If you can’t disagree with a woman without reaching for all those filthy old insults, screw you and your politics. 2/14 — J.K. Rowling (@jk_rowling) June 9, 2017

I’m sick of ‘liberal’ men whose mask slips every time a woman displeases them, who reach immediately for crude and humiliating words 3/14 — J.K. Rowling (@jk_rowling) June 9, 2017

associated with femaleness, act like old-school misogynists and then preen themselves as though they’ve been brave. 4/14 — J.K. Rowling (@jk_rowling) June 9, 2017

When you do this, Mr Liberal Cool Guy, you ally yourself, wittingly or not, with the men who send women violent pornographic images 5/14 — J.K. Rowling (@jk_rowling) June 9, 2017

and rape threats, who try by every means possible to intimidate women out of politics and public spaces, both real and digital. 6/14 — J.K. Rowling (@jk_rowling) June 9, 2017

‘Cunt’, ‘whore’ and, naturally, rape. We’re too ugly to rape, or we need raping, or we need raping and killing. 7/14 — J.K. Rowling (@jk_rowling) June 9, 2017

Every woman I know who has dared express an opinion publically has endured this kind of abuse at least once, 8/14 — J.K. Rowling (@jk_rowling) June 9, 2017

rooted in an apparent determination to humiliate or intimidate her on the basis that she is female. 9/14 — J.K. Rowling (@jk_rowling) June 9, 2017

If you want to know how much fouler it gets if you also happen to be black or gay, ask Diane Abbot or Ruth Davidson. 10/14 — J.K. Rowling (@jk_rowling) June 9, 2017

I don’t care whether we’re talking about Theresa May or Nicola Sturgeon or Kate Hooey or Yvette Cooper or Hillary Clinton: 11/14 — J.K. Rowling (@jk_rowling) June 9, 2017

femaleness is not a design flaw. If your immediate response to a woman who displeases you 12/14 — J.K. Rowling (@jk_rowling) June 9, 2017

is to call her a synonym for her vulva, or compare her to a prostitute, then drop the pretence and own it: you’re not a liberal. 13/14 — J.K. Rowling (@jk_rowling) June 9, 2017