More than 1,000 Jewish activists and their allies descended on Washington, D.C., on Sunday to protest the annual policy conference held by the American Israel Public Affairs Committee, better known as AIPAC.

Vice President Mike Pence is a keynote speaker at this year’s AIPAC conference, which opened only days after the Senate confirmed Trump’s bankruptcy lawyer, David Friedman, to serve as the U.S. ambassador to Israel. Friedman is a backer of Israel’s Jewish-only settlements in the Palestinian territories. A recently published U.N. report accused the Israeli government of imposing an “apartheid regime” on the Palestinians.

During Sunday’s protest, some young Jewish activists chained themselves to the doors of the conference center, while others dropped banners from inside. This is Cornel West, speaking to activists outside the conference.

Cornel West: “We come from a very rich and deep prophetic tradition that goes back to Amos and Jeremiah and Esther. It goes back to Rabbi Abraham Joshua Heschel, Albert Einstein and Muriel Rukeyser and so many others. And so we tell some of our more conservative brothers and sisters on the inside that you do not represent the best of the Jewish prophetic tradition, and we’re here to bear witness.”