Our Christian God, the merciful, forgiving God, the personification of eternal love, our father, as Christ has taught us, had absolutely not the slightest thing in common with the vengeful bloodthirsty, angry old Jaweh of the Jews... the old Jew-God Jaweh is... identical with Satan!

Letter to Eva Chamberlain-Wagner (14 April 1927), quoted in John C. G. Röhl, Wilhelm II: Into the Abyss of War and Exile 1900-1941 (Cambridge: Cambridge University Press, 2014), p. 1236.