The USA winger was whistled and jeered during Sunday's home defeat to Aston Villa.
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Asked about Aaronson's confidence, Farke replied: "We were not scared today to make mistakes.
"We were not hiding today. We were brave and went for it. This is how I want a Leeds United side to play, not like it was away at Nottingham (Forest)."
On the barracking of Aaronson, he added: "Is it really like how we want to treat human beings in our society?
"We feel better if we can put our anger on another human being. I don't like it."