Careful, Joanne might decide to say that actually golem legends are lies made up by rabbis to steal real wizard valour.

The Sun-Cross series is the one where a wizard has to escape the Nazis who reverse-isekaied him into our world, right? Was there jewish mysticism in the book? Haven't read it myself but I literally just read a critic describing it as an interesting experiment with/subversion of the portal-quest fantasy subgenre (instead of being directly told about the true nature of the world by reliable wise sage figures (eg. Gandalf, Aslan), the protagonist has to actively question and interpret the world around him to find out the truth (ie. the holocaust)).