The Jewish human-rights group B’Nai Brith Canada is urging PayPal not to process donations to Laith Marouf, whose derogatory tweets about “Jewish white supremacists,” francophones and Black and Indigenous public figures were condemned by the Prime Minister. Mr. Marouf has been publicly appealing for donations following the federal Heritage Department’s decision to cancel a $133,000 contract with the Canadian Media Advocacy Centre (CMAC), an anti-racism organization where he is a senior consultant. He has been soliciting donors using an online platform called Donorbox, which relies on PayPal’s money-transfer services to process contributions. Donorbox requires its customers to follow PayPal’s acceptable...