LONDON: J.K. Rowling, creator of the mass-selling “Harry Potter” books, made an impassioned plea Monday for Britons to vote to stay in the EU, warning in a blog posting against rising nationalism across the world.

The British author, whose novels and films about the boy wizard have become a global phenomenon, said many of those backing a Brexit in Thursday’s EU referendum were making a protest “against everything about modern life that scares us.”

She condemned US presumptive Republican presidential nominee Donald Trump as a “fascist in all but name,” and said his “nationalist cries” had been reflected in the campaign for Britain to end its 43-year membership of the European Union.

She especially condemned an anti-immigration poster by the UK Independence Party (UKIP), led by Nigel Farage, showing refugees trying to come into Europe as “an almost exact duplicate of propaganda used by the Nazis.”