What literary device does wiesel employ to emphasize the foolish optimism and denial of facts of the Jews living in sighet and how is it used?

Oh honey, Elie Wiesel ain't playin' games with those Jews in Sighet. He's all about that irony, using it to shine a big ol' spotlight on their rose-colored glasses and refusal to see the writing on the wall. Wiesel's like, "Y'all better wake up and smell the coffee before it's too late!"