https://web.archive.org/web/20120201081506/https://www.washingtonpost.com/gene-weingarten-defines-shanda-for-the-goyim/2011/05/17/AFaOBn5G_story.html

To be a shanda for the goyim is to confirm the most hurtful stereotypes,thereby doing damage twice: a Jew who dishonors Jews by not only doing something bad, but doing something that confirms the worst fears of others about Jews in general.