Antisemitism in the United States has been a problem for Jewish Americans for centuries. Antisemitic occurrences have been on a generally decreasing trend in the last century consistent with a general reduction of socially sanctioned racism in the United States, especially since World War II and the Civil Rights Movement. Cultural changes from the 1960s onward into the 21st century have caused a large shift in general attitudes such that, in recent years, most Americans surveyed express positive viewpoints regarding Jews.
In the United States, most Jewish community relations agencies draw a distinction between antisemitism, which is measured in terms of attitudes and behaviors, and the security and status of American Jews, which is measured by specific incidents. An ABC News report in 2007 recounted that about 6% of Americans reported some feelings of prejudice against Jews. According to surveys by the Anti-Defamation League, antisemitism is rejected by clear majorities of Americans, with 64% of them lauding Jews' cultural contributions to the nation in 2011, but a minority holding hateful views of Jews remain, with 19% of Americans supporting the antisemitic canard that Jews co-control Wall Street in 2011. As well, Holocaust denial in recent years has been only a fringe phenomenon with an estimated one percent of Americans expressing opposition to the historical record.
Krefetz (1985) asserts that antisemitism of the 1980s seems "rooted less in religion or contempt and more in envy, jealously and fear" of Jewish affluence, and of the hidden power of "Jewish money". Historically, antisemitic attitudes and rhetoric tend to increase when the United States is faced with a serious economic crisis.
Academic David Greenberg has written in Slate, "Extreme anti-communism always contained an anti-Semitic component: Radical, alien Jews, in their demonology, orchestrated the Communist conspiracy." He also has argued that, in the years following World War II, some groups of "the American right remained closely tied to the unvarnished anti-Semites of the '30s who railed against the 'Jew Deal'", a bigoted term used against the New Deal measures under President Franklin D. Roosevelt.