Despite in his earlier years sharing the old-fashioned antisemitism of conservative France, Claudel's response to the radical racialist Nazi kind was unequivocal, writing an open letter to the World Jewish Conference in 1935 condemning the Nuremberg Laws as "abominable and stupid." His daughter-in-law's sister married a Jew, Paul-Louis Weiller, who was arrested by the Vichy government in October 1940. Claudel went to Vichy to intercede for him, to no avail; luckily Weiller managed to escape (with Claudel's assistance, the authorities suspected) and flee to New York. Claudel made known his anger at the Vichy government's anti-Jewish legislation, courageously writing a published letter to the Chief Rabbi, Israel Schwartz, in 1941 to express "the disgust, horror, and indignation that all decent Frenchmen and especially Catholics feel in respect of the injustices, the despoiling, all the ill treatment of which our Jewish compatriots are now the victims... Israel is always the eldest son of the promise God, as it is today the eldest son of suffering." The Vichy authorities responded by having Claudel's house searched and keeping him under observation. His support for Charles de Gaulle and the Free French forces culminated in his victory ode addressed to de Gaulle when Paris was liberated in 1944.