The Anti-Defamation League (ADL) has become the target of a sustained right-wing backlash after the US-based Jewish advocacy group included an organisation founded by slain right-wing figure Charlie Kirk in its online database on extremism.The blowback escalated sharply on Wednesday after FBI Director Kash Patel announced that the bureau would sever ties with the ADL, accusing the prominent advocacy group of spying on Americans.Tech billionaire Elon Musk’s post calling the ADL a “hate group” set off a firestorm of criticism online, forcing the group to scrap the “Glossary of Extremism and Hate”, which contained more than a thousand entries on groups and movements with connections to hateful ideologies.But that has not subdued the backlash from conservatives – the base of the governing Republican Party.So, what’s ADL’s online database, and why has it triggered MAGA (Make America Great Again) rage? And how has the nonprofit, which backed the crackdown on pro-Palestine campus protests by the administration of US President Donald Trump, ended up ruffling feathers across the political spectrum?What is ADL?The ADL is one of the oldest and most influential Jewish advocacy groups in the United States. It was founded in 1913 by members of the B’nai B’rith – Hebrew for “Sons of the Covenant”, a Jewish fraternal organisation – to counter anti-Semitism and prejudice against Jews.The group, which calls itself “a global le …