I'd like to recommend a book I just finished: The other side of Israel. It is written by a (former) Zionist Jew. She goes to live in an Arab town in Israel and very quickly realizes she is living in an apartheid state. We don't hear much about Palestinian residents of Israel because things are worse for Palestinian citizens of the West Bank and Gaza, but they are pretty fucked as well. It would be a good book to give to any colleague of yours who is not fully aware and outraged at the racism and apartheid.