Sentence:  In regard to Eichmann , it was to <WSD>be</WSD> found in the Nazi outlook , which contained a principle separate from and far worse than anti-Semitism , a principle by which the poison of anti-Semitism itself was made more virulent . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)