Adam Milstein, the chairman of the hawkish Israeli American Council, backed out of a commitment to moderate a panel at the upcoming AIPAC conference amid a controversy over a tweet in which he said that the values of Muslim congresswomen Ilhan Omar and Rashida Tlaib "clash with American values."

Milstein, who also serves on the boards of a number of pro-Israel groups, including the AIPAC National Council, the Israel on Campus Coalition and StandWithUs, has a long history of controversial tweets. Below, some standouts.

1. Soros

In 2017, Milstein tweeted a picture depicting Jewish billionaire George Soros as an octopus enveloping the world -- an image that drew on common anti-Semitic tropes. He later deleted the tweet. "I'll try to be more careful in the future," he told JTA at the time.

2. Soros, again

Earlier that year, Milstein had described George Soros in a tweet as "a self-hating #Jew."