The New York Times' first article on Adolf Hitler, "Hitler New Power in Germany", written in 1922 (but still paywalled), referred to fears of a St. Bartholomew's Day massacre. Was that the standard way of referring to an incident of racist violence back then, before we had Kristallnacht?
Doing an NGrams search for St. Bartholomew's doesn't have a sharp drop after Kristallnacht occurred.