The word kike is an ethnic slur for a Jew. The slur came from the Yiddish word kikel ("circle"), due to how Jewish immigrants drew a circle instead of an X on their immigration paper.
During the Iași pogrom on 28–30 June 1941 (13,266 Jews killed within two days), a former professor was shot by a Romanian soldier for trying to save Jews who were under attack. When shooting the former professor, the Romanian soldier reportedly yelled,
You dog, die with the kike you are defending!
The word was spotted in several pro-Palestinian protests, with a Jewish woman in the New York City being called a "Fucking murderous kike" by a protester in an argument. A similar incident happened at California's Occidental College and Pomona College, against which the American civil rights groups Anti-Defamation League (ADL) and Brandeis Center for Human Rights Under Law filed Title VI complaints for the hurt Jewish students.