It seems as if many readers do not understand the historical facts behind the – often rocky – relationship between the Nazi party and the Catholic church (Letters, 18 September). Initially, the Catholic church was – unlike the Protestant church, which introduced the German "heil" salute as early as 1934 and became a form of "state church" – "public enemy" to the Nazis with its ideas of Volksgemeinschaft and Führerprinzip, the principles of racially pure people's unity and Führer leadership.
The SS prohibited its members from exercising their Catholic belief, which was originally regarded as something that contradicted an SS member's ethos (interestingly, it was Himmler who allowed SS men to convert to Islam from 1939 to make inroads with the Muslim world). The German Catholic church was among Hitler's staunchest critics, and priests faced prosecution. With the beginning of the war, this hostile stance towards the Catholic church changed: war sometimes requires "tolerance" when in the interest of the war effort (Stalin, for example, allowed the Russian peasant population to turn – once again – to religion after the June 1941 invasion to boost morale).
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In order to win the support of some 14 nations, the majority of them Catholic, in their fight against "Bolshevism", the Nazis successfully appealed to a sense of a common "European" identity founded on cultural heritage and religion: Operation Barbarossa was portrayed as a "crusade" against the "unholy alliance" of Bolshevism and Zionism.
Pope Pius XII's role is still not thoroughly researched and the present negative assessment of his role may change after US and UK archives are fully opened.