guess who is now an expert on Iran?

why is this man, who heads an organization that ostensibly fights some forms of defamation, cited in the news on foreign policy issues?  "But at the more basic level, this is an argument about more than just what the Iranians give up, and what they get in return. “In order to get into sync on the strategy, you need trust, and the trust has been eroded,” said Abraham H. Foxman, the national director of the Anti-Defamation League, who has just returned from Israel and is lobbying vigorously against the preliminary deal."