Hitler wrote his first antisemitic letter to Adolf Gemlich on 16 September 1919 stating that Jews were a race and not a religious group and that the aim for the government "must unshakably be the removal of the Jews altogether". Throughout "Mein Kampf", Hitler employs biological crudity by describing the Jews as "parasites" or "vermin". Reflecting back on the beginning of the First World War, Hitler makes the eerily prescient statement that if "twelve or fifteen thousand of these Hebrew corrupters of the people had been held under poison gas, as happened to hundreds of thousands of our very best German workers in the field, the sacrifice of millions at the front would not have been in vain."