A highly informative article that attempts to explain the historical and cultural links between these two forms of oppression. May be useful in the later stages of a dialogue journey with a racism skeptic.
http://www.politicalresearch.org/2017/06/29/skin-in-the-game-how-antisemitism-animates-white-nationalism/#sthash.xyKGl7XX.8wzHtGJZ.dpbs