Among European Muslims in Western Europe, the incidence of such views was almost three times higher than in the general population, as defined by the Anti-Defamation League’s study.

A significant proportion of those surveyed agreed with statements that said Jews were more loyal to Israel than to their own country, Jews talked too much about the Holocaust, and Jews had too much power in business and finance. The study comprises an index of 11 questions that are used to identify anti-Semitic attitudes.

“It is deeply concerning that approximately one in four Europeans harbor the types of anti-Semitic beliefs that have endured since before the Holocaust,” said Jonathan A. Greenblatt, the League’s chief executive.