The “oppressors” in Israel were the Arab Muslims, who invaded and conquered Israel and built a mosque right on top of the holiest Jewish land in existence. The “occupiers” in Israel are the Arabs who remain from that invasion, plus a far larger amount who came in under Ottoman and British rule much later.
One member, Samia Shoman, is a Palestinian-American who teaches in the San Mateo Union High District.
Her lesson plans on Palestinian history have been featured as a teaching tool by the Qatar Foundation International, a group tied to the nation and its efforts to proliferate boycotts of Israel.
Shoman is also a pro-Palestinian activist on Twitter.