Press, Jews & Mosquitoes... are a nuisance that humanity must get rid of in some way or another. I believe the best would be gas?

Letter to Poultney Bigelow (15 August 1927), quoted in John C. G. Röhl, Wilhelm II: Into the Abyss of War and Exile 1900-1941 (Cambridge: Cambridge University Press, 2014), p. 1238.