This morning I found in one of the US National Archive Katyn records finding aid published 1 Aug 2012 a possible clue to the addition of the "JUDE-NKVD" heading on Tony's Katyn poster:
Defense Exhibits in Case No. 11, U.S. v. Ernst von Weizsaecker, et al., 1947-1949 (ARC 6220231; Microfilm M-897 “Records of the United States Nuernberg War Crimes Trials: 'United States of America v. Ernst von Weizsaecker et al.' (Case XI), Dec. 20, 1947-Apr. 14, 1949) – There is a folder among exhibits for Otto Dietrich titled “Dietrich Exh. 126” that contains excerpts from “Oberheitman Material” and “Voelkischer Beobachter” dated 1943 showing directives for anti-Semitic propaganda and propaganda on the Katyn affair emphasizing the Jewish connection to the Katyn Massacre.