Readers respond to an essay criticizing U.S. Democrats’ failure to resolve the conflict in Gaza. Also: Trump’s Kennedy Center rebrand; blaming immigrants after the Brown shooting.

A single suspect carried out the shooting at Brown University and the killing of an M.I.T. professor, and was later found dead in New Hampshire, authorities said.

© Christopher Capozziello for The New York Times

Nuno F.G. Loureiro, the professor, attended the same physics program in Portugal as the man suspected in his killing.

© Leah Willingham/Associated Press

Officials identified a man from Portugal as the suspect in the deadly shooting at Brown University and the killing of an M.I.T. professor. The police said he died from a self-inflicted gunshot.

© Christopher Capozziello for The New York Times

Bravery and cowardice are both exemplary teachers.