Over the weekend, Google CEO Sundar Pichai faced a small revolt when he delivered his commencement speech at Stanford University, where he earned his graduate degree in materials science and engineering. About 200 students from the graduating class reportedly walked out, while others loudly booed the tech executive.

The focus of the protest was Google’s defense ties — including Project Nimbus, the controversial $1.2 billion contract, shared with Amazon, to provide cloud and AI services to the Israeli military, as well as its relationship with the U.S. Immigration and Customs Enforcement agency.

Student signs included phrases like “ICE SPIES WITH GOOGLE AI” and “GENOCIDE RUNS ON GOOGLE,” as well as “FREE FREE PALESTINE,” a press release associated with the protest notes. Students also waved Palestinian flags and shouted “free Palestine,” online video of the protest shows.

“We are walking out because we refuse to glorify the corporations that fuel this violence and exercise our power to choose differently,” a statement associated with the protest reads.

The walkout was organized by a number of campus activist groups, including Stanford Students for Justice in Palestine, No Tech for Apartheid, and Tech for Liberation. TechCrunch reached out to Google for comment.