Hitler Adolf, Cruel

Adolf Hitler, quoted in “Hitler”, by Joachim Fest, Vintage
Books Edition, 1974, p. 679-680:
Nature is cruel; therefore we are also entitled to be cruel. When I
send the flower of German youth into the steel hail of the next war
without feeling the slightest regret over the precious German blood
that is being spilled, should I not also have the right to eliminate
millions of an inferior race that multiplies like vermin?