I experienced a similar event in my time as a college student. It was a wake up call for me to learn about the issue. It was not only the arabs, but even my professors for Abrahamic religions, a Jew also feeding this rhetoric that “brown kids” and even a “brown person like you” should know better than to support Israel. I think you are right on taking the action to just ask their reasoning and questions on what is the greater course of action. Learning where the main issue lies in that specific person can help you learn how to navigate the conversation and introduce your thoughts.