I think the term monkey is used by Jewish people for anyone who isn't Jewish, not just black people. After all, we're all just animals to them.The Sephardic chief rabbi of Israel called black people “monkeys” during his weekly sermon on Saturday evening.
I worked at a company owned by a Jewish family. A young woman told one of the owners she was going to quit (I can't remember the circumstances). He told her no problem because he could get another monkey just like her off the street in no time. She was white.