It comes more from the German usage of the word. Jude, and Judin which are the German equivalent to “Jew”, became synonymous with Jewish dehumanization, so saying “Jew” or “Jews” in the wrong context can get pretty derogatory. Plus it is commonly included in a lot of anti-Semitic slurs or curses, like “Jew bastard”.
It comes more from the German usage of the word. Jude, and Judin which are the German equivalent to “Jew”, became synonymous with Jewish dehumanization, so saying “Jew” or “Jews” in the wrong context can get pretty derogatory. Plus it is commonly included in a lot of anti-Semitic slurs or curses, like “Jew bastard”.