Szcześniak was among the first who raised the issue of the Katyń massacre in the mid-1980s and published several books on the subject.
In 2004, the Golgotha of the East Foundation [pl], whose statute goal is the commemoration of the victims of the massacre, awarded him posthumously the "Golgotha of the East - Katyń 1940" Medal (Medal Golgoty Wschodu – Katyń 1940).
[3] Szcześniak is known for reviving the conspiracy theory of Judeopolonia, authoring two volumes under this title, which present Jews as "informers and spies for the tsar, tightfisted hyenas and arrogant sassy people who oppress the Polish people.
"[4] Polish journalist Anna Bikont writes that during the Communist times he had a near-monopoly on the history textbooks, but with the fall of Communism he switched the rhetoric in the textbooks from Communist to nationalist.
[5] She cites him saying on the occasion of Jedwabne Massacre that "The hysteria around Jedwabne is aimed at shocking Poles and extracting sixty-five billion dollars from our people in the framework of the Holocaust business".