Anti-Defamation League CEO Jonathan Greenblatt speaks at the group’s 2018 National Leadership Summit in Washington, D.C. (Michael Brochstein/SOPA Images/LightRocket via Getty Images) ( JTA ) – When it comes to antisemitism on social media, the algorithms governing the major platforms shoulder some of the blame for their reach. But the Anti-Defamation League hopes to fight the spread — by creating an algorithm of its own. The Jewish civil rights group announced Tuesday that it has built a system called the Online Hate Index , describing it as the first tool ever developed to measure antisemitism on social media platforms. The...