The protest organized by student survivors of the Parkland high school shooting will take place in Washington and other U.S. cities.
The American-Jewish comedian started the conversation by tweeting her support for freeing Palestinian Ahed Tamimi from an Israeli military prison.
Israeli Prime Minister Benjamin Netanyahu and U.S. Ambassador to the United Nations Nikki Haley also were confirmed as speakers to the annual policy conference.
The Jewish comic skewered neo-Nazis such as David Duke in a set on Conan O'Brien's late-night show.
Heather Nauert, the State Department spokeswoman, said Israel is like your oldest and bestest girlfriend.
Orthodox officials responded that they had raised concerns in a timely fashion about the president's equivocation following the neo-Nazi march in Charlottesville.
Celebrated as a symbol for coexistence, Mennel Ibtissem may be kicked off "The Voice" for calling the police terrorists and spreading conspiracy theories in defense of jihadist killers.
No mainstream Palestinian leaders have praised the attack; a spokesman for Hamas did.
Gabrielle Birkner, with Deborah Soffer, created a platform where people could seek and share stories of grief "honestly, openly, with poignancy and humor."
The leader of the Reconstructionist movement explains why its college and synagogue union are getting a new name.